TWI423638B - Communication system, test device, communication device, communication method, and test method - Google Patents

Description

Communication system, test device, communication device, communication method, and test method

The invention relates to a communication system, a test device, a communication device, a communication method and a test method. The present application is related to the international patent application described below, and is an invention application claiming priority from the following international patent application.

1. PCT/JP2008/65458 filing date August 28, 2008

In a communication system in which serial communication is performed between a master device and a slave device, data communication is performed after synchronization of packets is acquired. Moreover, when a communication abnormality occurs in such a communication system, the slave device is reset and the synchronization of the packets is reacquired.

However, in a communication system that performs serial communication via an optical communication medium, whether or not the communication partner is activated can be detected by whether or not the communication partner can obtain light. However, in a communication system that performs serial communication via an electrical communication medium, it is difficult to detect whether or not the communication partner is activated.

Further, in the communication system in which serial communication is performed via the optical communication medium, the main device turns on/off the light, so that the slave device can be simply reset. However, in a communication system that performs serial communication via an electrical communication medium, the master device cannot simply reset the slave device.

Accordingly, it is an object of the present invention to provide a communication system, a test apparatus, a communication apparatus, a communication method, and a test method capable of solving the above problems. This object is achieved by a combination of features described in separate items in the scope of the patent application. Moreover, the dependent items specify a more advantageous specific example of the invention.

In order to solve the above problems, a first aspect of the present invention provides a communication system including a communication device having a first communication device and a second communication device, wherein the first communication device includes a communication unit that transmits the first data signal. And communicating with the second communication device; the active signal receiving unit receives the active signal via the first active signal line, and the active signal indicates whether the second communication device is compatible with the foregoing An active state in which the communication device performs communication; and a reset signal transmitting unit that transmits a reset signal to the second communication device when the second communication device is not in an active state; and the second communication device The communication unit includes: communicating with the first communication device via the first data signal line; the active signal transmitting unit transmitting the active signal via the first active signal line; and resetting the signal receiving unit When receiving the reset signal, the communication unit of the second communication device is reset.

A second aspect of the present invention provides a test apparatus, which is a test apparatus for testing a component to be tested, comprising: a test module that tests the component to be tested; and a control device that is implemented by the test module The test of the tested component is controlled; and a relay device that relays communication between the control device and the test module; and the control device includes: a communication portion that passes through the first data signal line Communicating with the relay device; the active signal receiving unit receives the active signal via the first active signal line, and the active signal indicates whether the relay device is in an active state capable of communicating with the control device And a reset signal transmitting unit that transmits a reset signal to the relay device when the relay device is not in an active state; and the relay device includes a communication unit that passes the first data The signal line communicates with the control device; the active signal transmitting unit transmits the active signal via the first active signal line; Signal receiving unit, in a case where the reset signal is received, the communication portion so that the relay device reset.

A third aspect of the present invention provides a communication device, which is a communication device that communicates with another communication device, including: a communication unit that communicates with the other communication device via the first data signal line; and the active signal reception Receiving an active signal via the first active signal line, the active signal indicating whether the other communication device is in an active state capable of communicating with the communication device, and a reset signal transmitting portion in the foregoing When the other communication device is not in an active state, a reset signal is transmitted to the other communication device.

A fourth aspect of the present invention provides a communication device, which is a communication device that communicates with another communication device, including: a communication unit that communicates with the other communication device via the first data signal line; and the active signal transmission And transmitting the active signal via the first active signal line; and resetting the signal receiving unit to reset the communication unit of the communication device when receiving the reset signal.

A fifth aspect of the present invention provides a communication method of a communication system including a first communication device and a second communication device, wherein the communication unit of the first communication device and the communication unit of the second communication device are Communicating with the first data signal line, and the active signal transmitting unit of the second communication device transmits an active signal via the first active signal line, the active signal indicating whether the second communication device is compatible with the foregoing An active state in which the communication device communicates, and the active signal receiving unit of the first communication device receives the active signal through the first active signal line, and the reset signal transmitting unit of the first communication device is in the foregoing When the second communication device is not in the active state, the reset signal is transmitted to the second communication device, and the reset signal receiving unit of the second communication device receives the reset signal. 2 The communication unit of the communication device is reset.

A sixth aspect of the present invention provides a test method, which is a test method for testing a test device of a test component, wherein the test device includes: a test module that tests the device under test; and a control device that is The test of the tested component implemented by the test module is controlled; the relay device relays communication between the control device and the test module; and the communication portion of the control device and the relay device The communication unit communicates via the first data signal line, and the active signal transmitting unit of the relay device transmits an active signal via the first active signal line, the active signal indicating whether the relay device is The control device performs an active state of communication, and the active signal receiving unit of the control device receives the active signal through the first active signal line, and the reset signal transmitting unit of the control device is not in the relay device In the active state, a reset signal is sent to the relay device, and the reset signal receiving portion of the relay device is received before receiving In the case of resetting the signal, the communication unit of the relay device is reset.

Further, the summary of the above invention does not enumerate all of the essential features of the present invention, and a subset of these feature groups may also form an invention.

Hereinafter, the present invention will be described by way of embodiments of the invention. However, the following embodiments are not intended to limit the invention in the scope of the claims, and all combinations of the features described in the embodiments are not necessarily the solutions of the invention. necessary.

Fig. 1 shows the configuration of a communication system 100 according to this embodiment. The communication system 100 includes a first communication device 10 and a second communication device 20. In this example, the first communication device 10 and the second communication device 20 perform data communication. In this example, the first communication device 10 functions as a master device in data communication. In this example, the second communication device 20 functions as a slave device in data communication.

The first communication device 10 and the second communication device 20 are connected by the first data signal line 111, the first active signal line 112, and the first reset signal line 113. The first data signal line 111 transmits serial data of an electric signal exchanged between the first communication device 10 and the second communication device 20.

The first active signal line 112 transmits an active signal from the second communication device 20 to the first communication device 10, wherein the active signal indicates whether the second communication device 20 is active for communication with the first communication device 10. status. In this example, the first active signal line 112 transmits an active signal indicating whether the second communication device 20 is in an active state at a voltage level.

The first reset signal line 113 transmits a reset signal from the first communication device 10 to the second communication device 20, and the reset signal is used to instruct the second communication device 20 to reset. In this example, the first reset signal line 113 transmits a reset signal indicating whether the second communication device 20 is instructed to reset by the voltage level.

The first communication device 10 includes a communication unit 11, an active signal receiving unit 12, and a reset signal transmitting unit 13. Further, the second communication device 20 includes a communication unit 21, an active signal transmitting unit 22, and a reset signal receiving unit 23.

The communication unit 11 of the first communication device 10 communicates with the second communication device 20 via the first data signal line 111. The active signal receiving unit 12 of the first communication device 10 receives the active signal from the second communication device 20 via the first active signal line 112. When the active signal receiving unit 12 of the first communication device 10 receives the active signal indicated by the voltage level, the active signal can be maintained for a predetermined period or longer (for example, a predetermined number of samples or more) as a predetermined level. Under the condition, it is determined whether or not the second communication device 20 is in an active state. When the second communication device 20 is not in the active state, the reset signal transmitting unit 13 of the first communication device 10 transmits a reset signal to the second communication device 20 via the first reset signal line 113.

The communication unit 21 of the second communication device 20 communicates with the first communication device 10 via the first data signal line 111. The active signal transmitting unit 22 of the second communication device 20 is in the active state in which the communication unit 21 of the second communication device 20 is in communication with the first communication device 10, and is first via the first active signal line 112. The communication device 10 transmits an active signal.

The reset signal receiving unit 23 of the second communication device 20 receives the reset signal from the first communication device 10 via the first reset signal line 113. When the reset signal receiving unit 23 of the second communication device 20 receives the reset signal, the communication unit 21 of the second communication device 20 is reset. When the reset signal receiving unit 23 of the second communication device 20 receives the reset signal indicated by the voltage level, the reset signal can be maintained for a predetermined period or longer (for example, a predetermined number of samples or more) as a condition. It is determined that the first communication device 10 outputs a reset signal.

Further, it is preferable that the period frequency of the data signal of the first data signal line 111 is lower than that of the first active signal line 112 and the first reset signal line 113. That is, the first data signal line 111 can be a cable capable of transmitting a higher frequency electrical signal than the first active signal line 112 and the first reset signal line 113. Thereby, the communication system 100 can use the cable which is cheaper than the first data signal line 111 as the first active signal line 112 and the first reset signal line 113.

FIG. 2 shows the processing in the case where the second communication device 20 is powered on. When the power of the second communication device 20 (slave device) is turned on, the communication unit 21 of the second communication device 20 is in an active state. When the communication unit 21 of the second communication device 20 is in an active state, the active signal transmitting unit 22 of the second communication device 20 changes the active signal from the low level to the high level (S1001).

Next, when the active signal receiving unit 12 of the first communication device 10 (master device) detects that the active signal changes from the low level to the high level, it is determined that the second communication device 20 is in an active state (S1002). Then, the communication unit 11 of the first communication device 10 and the second communication device 20 start the synchronization operation of the data communication via the first data signal line 111 (S1003). Thus, the first communication device 10 and the second communication device 20 can establish data communication via the first data signal line 111. As described above, if the communication system 100 is utilized, the first communication device 10 can easily detect the activation of the second communication device 20.

FIG. 3 shows a process in which the communication function of the second communication device 20 is abnormal. When the communication function of the second communication device 20 (slave device) is abnormal, for example, when the hang-up of the serial communication is generated in the second communication device 20, the communication unit 21 of the second communication device 20 Not active. When the communication unit 21 of the second communication device 20 is not in the active state, the active signal transmitting unit 22 of the second communication device 20 changes the active signal from the high level to the low level (S1101).

Next, when the active signal receiving unit 12 of the first communication device 10 (master device) detects that the active signal has changed from the high level to the low level, it is determined that the second communication device 20 is not in the active state (S1102). Then, the reset signal transmitting unit 13 of the first communication device 10 changes the reset signal from the low level to the high level (S1103). As an example, the reset signal transmitting unit 13 of the first communication device 10 can return to the low level after a certain period of time has elapsed after the reset signal is changed to a high level.

Next, when the reset signal receiving unit 23 of the second communication device 20 detects that the reset signal has changed from the low level to the high level, it is determined that the reset signal is output from the first communication device 10 (S1104). Then, the communication unit 21 of the second communication device 20 initializes each function that performs data communication with the first communication device 10 via the first data signal line 111, and restarts the communication function (S1105). As a result, the communication unit 21 of the second communication device 20 is in an active state. When the communication unit 21 of the second communication device 20 is in an active state, the active signal transmitting unit 22 of the second communication device 20 changes the active signal from the low level to the high level (S1106).

Next, when detecting that the active signal changes from the low level to the high level, the active signal receiving unit 12 of the first communication device 10 determines that the second communication device 20 is in an active state (S1107). Then, the communication unit 11 and the second communication device 20 of the first communication device 10 start the synchronous operation of the data communication via the first data signal line 111 (S1108). As described above, even when the first communication device 10 and the second communication device 20 generate an abnormality in the data communication via the first data signal line 111, the first communication device 10 (main device) can easily perform the second communication. The device 20 (slave device) performs a reset.

Further, in step S1103, the reset signal transmitting unit 13 of the first communication device 10 changes the reset signal from the low level to the high level and gives a reset instruction to the second communication device 20. However, other methods may be used. The second communication device 20 is reset. When the packet transmitted from the first communication device 10 to the second communication device 20 via the first data signal line 111 forms a congestion or the like, the first communication device 10 is in an active state even if the second communication device 20 is in an active state. The communication function of the second communication device 20 can also be reset.

Further, when the second communication device 20 is in an active state, the communication unit 11 of the first communication device 10 may transmit a reset request to the second communication device 20 via the first data signal line 111 as needed. As an example, when the second communication device 20 is in an active state, the communication unit 11 of the first communication device 10 may transmit a reset request to the second communication device 20 via the first data signal line 111. A reset is requested to instruct at least a portion of the second communication device 20. For example, the communication unit 11 of the first communication device 10 may transmit a reset request to the second communication device 20 via the first data signal line 111, and the reset request includes circuit identification information for identifying a circuit to be reset.

Further, when the reset request is transmitted via the first data signal line 111 as described above, the communication unit 21 of the second communication device 20 resets the circuit corresponding to the circuit identification information, and the circuit identification information is included in the 1 data signal line 111 received in the reset request. For example, the communication unit 21 of the second communication device 20 resets the circuit corresponding to the circuit identification information included in the reset request received via the first data signal line 111. Thereby, the first communication device 10 can transmit a normal reset request to the second communication device 20 via the first data signal line 111, and can transmit an emergency to the second communication device 20 via the first reset signal line 113. Reset request.

FIG. 4 shows a process in the case where an abnormality occurs in the communication function of the first communication device 10. When the communication function of the first communication device 10 (main device) can generate an abnormality, for example, when the packet synchronization of the serial communication in the first communication device 10 is broken, the reset signal transmitting portion 13 of the first communication device 10 makes The reset signal changes from the low level to the high level (S1201).

Next, when the reset signal receiving unit 23 of the second communication device 20 detects that the reset symbol has changed from the low level to the high level, it is determined that the reset instruction is given from the first communication device 10 (S1202). Then, the communication unit 21 of the second communication device 20 initializes each function that performs data communication with the first communication device 10 via the first data signal line 111, and restarts the communication function (S1203).

Next, the communication unit 21 of the second communication device 20 and the first communication device 10 start synchronization operation of data communication via the first data signal line 111 (S1204). As described above, even when the first communication device 10 and the second communication device 20 generate an abnormality in the data communication via the first data signal line 111, the first communication device 10 (main device) can easily connect the second communication device. 20 (slave device) reset.

Fig. 5 shows the configuration of a communication system 100 according to a modification of the embodiment. Further, since the communication system 100 according to the present modification has substantially the same configuration and function as the communication system 100 shown in FIG. 1, the configuration and function substantially the same as those of the communication system 100 shown in FIG. Members are denoted by the same reference numerals, and the description will be omitted except for differences.

The communication system 100 of the present modification further includes a plurality of third communication devices 30. The plurality of third communication devices 30 perform data communication with the second communication device 20, respectively. Each of the plurality of third communication devices 30 and the second communication device 20 are connected by a second data signal line 121. The second data signal line 121 transmits data of an electrical signal exchanged between the second communication device 20 and the plurality of third communication devices 30.

When the reset signal receiving unit 23 of the second communication device 20 receives the reset signal, the communication unit 21 of the second communication device 20 is reset. Then, the communication unit 21 of the second communication device 20 resets each of the plurality of third communication devices 30 when the active state is formed. As a result, when the communication system 100 according to the present modification is used, even when one of the plurality of third communication devices 30 includes a cause of a communication failure, the first communication device 10 and the second communication can be surely made. The data communication between the devices 20 is restored.

Further, when the second communication device 20 is in the active state, the communication unit 11 of the first communication device 10 can transmit a reset request including the device identification information to the second communication device 20 via the first data signal line 111. The device identification information is used to identify the third communication device 30 of the reset target among the plurality of third communication devices 30. Then, upon receiving such a reset request, the communication unit 21 of the second communication device 20 resets the third communication device 30 corresponding to the device identification information, and the device identification information is included in the first data signal line. 111 and received in the reset request. Thereby, if the communication system 100 according to the present modification is used, only the third communication device 30 including one of the factors forming the communication failure can be reset.

Fig. 6 shows a configuration of a communication system 100 according to a second modification of the embodiment. Further, since the communication system 100 according to the present modification has substantially the same configuration and function as the communication system 100 shown in FIG. 5, the configuration and function similar to those of the communication system 100 shown in FIG. 5 are substantially the same. The same components are denoted by the same reference numerals, and the description will be omitted except for the differences.

The second communication device 20 and the plurality of third communication devices 30 are connected by a plurality of second data signal lines 121 and a plurality of second reset signal lines 123. A plurality of second data signal lines 121 are provided corresponding to each of the plurality of third communication devices 30, respectively. Each of the second data signal lines 121 transmits serial data of the electrical signals exchanged between the second communication device 20 and the corresponding third communication device 30.

A plurality of second reset signal lines 123 are provided corresponding to each of the plurality of third communication devices 30, respectively. Each of the second reset signal lines 123 transmits a reset signal for instructing reset from the second communication device 20 to the corresponding third communication device 30. In this example, each of the second reset signal lines 123 transmits a reset signal indicating whether the reset is indicated to the corresponding third communication device 30 by the voltage level.

In the present modification, the second communication device 20 further includes a reset signal transmitting unit 24. Further, in the present modification, each of the third communication devices 30 includes a communication unit 31 and a reset signal receiving unit 33.

The communication unit 21 of the second communication device 20 communicates with each of the plurality of third communication devices 30 via each of the plurality of second data signal lines 121. Further, the reset signal transmitting unit 24 of the second communication device 20 transmits a reset signal to each of the plurality of third communication devices 30 via the respective pieces of the plurality of second reset signal lines 123.

The communication unit 31 of each of the third communication devices 30 communicates with the second communication device 20 via the second data signal line 121. The reset signal receiving unit 33 of each of the third communication devices 30 receives the reset signal from the second communication device 20 via the second reset signal line 123. When the reset signal receiving unit 33 of the third communication device 30 receives the reset signal from the second communication device 20 via the second reset signal line 123, the communication unit 31 of the third communication device 30 is reset.

When the reset signal receiving unit 23 of the second communication device 20 receives the reset signal from the second communication device 20 via the first reset signal line 113, the communication unit 21 of the second communication device 20 is made heavy. The reset signal transmitting unit 24 is given an instruction to transmit the reset symbol. Then, when the reset signal transmitting unit 24 of the second communication device 20 receives an instruction to transmit the reset signal from the reset signal receiving unit 23, the plurality of second reset signal lines 123 are paired with each other. 3 The communication device 30 sends a reset signal separately. Thereby, the second communication device 20 can surely reset all of the plurality of third communication devices 30 in an emergency.

Further, in the communication system 100 according to the present modification, the communication unit 21 of the second communication device 20 transmits a reset signal to the third communication device 30 corresponding to the device identification information via the first data signal line 111. The device identification information is included in the reset request received via the first data signal line 111. Accordingly, in the second communication device 20, normally, only the third communication device 30 specified by the reset request given by the first communication device 10 among the plurality of third communication devices can be reset.

Fig. 7 shows the configuration of the test apparatus 200 of the present embodiment. The test apparatus 200 tests a device under test such as a semiconductor device. The test apparatus 200 includes one or more test modules 230, a control device 210, and a relay device 220.

Each test module 230 transmits and receives signals between the tested components. As an example, the test module 230 supplies a test signal of a waveform commensurate with the test pattern to the device under test, and compares the response signal from the tested component with a logic value commensurate with the expected value pattern to determine the component to be tested. Good or bad. As an example, each test module 230 can be a circuit board configured within the test head.

The control device 210 accesses one or more test modules 230 and controls each test module 230. As an example, the control device 210 can be realized by executing a program and using a computer functioning as the control device 210.

The relay device 220 relays access requests transmitted between the control device 210 and the test module 230. The relay device 220 can be a switch circuit board that is configured within the test head. Relay device 220 can also be replaced by a communication interface within each test module 230.

As an example, the control device 210 and the relay device 220 are connected by a serial transmission cable 311 of a few meters or so and an active cable 312 and a reset cable 313, wherein the serial transmission cable 311 For transmitting serial data, the active cable 312 and the reset cable 313 are disposed in parallel with the serial transmission cable 311. Further, the relay device 220 and each of the test modules 230 are connected by a parallel bus 321 that transmits parallel data.

In addition, the test apparatus 200 may also be configured as a plurality of test apparatuses 200 having a layered connection. Moreover, the test apparatus 200 may be configured to directly connect the test module 230 and the control device 210.

In the test apparatus 200 having such a configuration, the control device 210 has the functions of the first communication device 10 described above. Further, the relay device 220 has the function of the second communication device 20. Further, each test module 230 has the function of the third communication device 30.

Further, the serial transmission cable 311 has the function of the first data signal line 111. The active cable 312 has the function of the first active signal line 112. The reset cable 313 has the function of the first reset signal line 113. Further, the parallel bus bar 321 has the function of the second data signal line 121 shown in FIG.

Thereby, if the test device 200 is utilized, the control device 210 can easily detect the activation of the relay device 220. Further, if the test device 200 is used, the control device 210 can easily set each of the relay device 220 and the plurality of test modules 230 even when an abnormality occurs in data communication via the serial transmission cable 311.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

The order of execution of the actions, procedures, steps, and stages in the devices, systems, programs, and methods shown in the patent application, the specification, and the drawings should be noted, as long as it is not specifically stated "before", "first ", and, in the subsequent processing, the output of the previous processing is not used, and it can be realized in an arbitrary order. The operation flow in the patent application scope, the specification, and the drawings will be described using [first], [and subsequent] for convenience of explanation, but it does not mean that it must be implemented in this order.

10. . . First communication device

11. . . Ministry of Communications

12. . . Active signal receiving unit

13. . . Reset signal transmission unit

20. . . Second communication device

twenty one. . . Ministry of Communications

twenty two. . . Active signal transmitting unit

twenty three. . . Reset signal receiving unit

twenty four. . . Reset signal transmission unit

30. . . Third communication device

31. . . Ministry of Communications

33. . . Reset signal receiving unit

100. . . Communication system

111. . . First data signal line

112. . . First active signal line

113. . . 1st reset signal line

121. . . Second data signal line

123. . . 2nd reset signal line

200. . . Test device

210. . . Control device

220. . . Relay device

230. . . Test module

311. . . Serial transmission cable

312. . . Active cable

313. . . Reset cable

321. . . Parallel bus

Fig. 1 shows the configuration of a communication system 100 according to this embodiment.

FIG. 2 shows a process of turning on the power of the second communication device 20.

FIG. 3 shows a process in which the communication function of the second communication device 20 is abnormal.

FIG. 4 shows a process in which the communication function of the first communication device 10 is abnormal.

Fig. 5 shows a configuration of a communication system 100 according to a first modification of the embodiment.

Fig. 6 shows a configuration of a communication system 100 according to a second modification of the embodiment.

Fig. 7 shows the configuration of the test apparatus 200 of the present embodiment.

10. . . First communication device (master device)

11. . . Ministry of Communications

12. . . Active signal receiving unit

13. . . Reset signal transmission unit

20. . . Second communication device (slave device)

twenty one. . . Ministry of Communications

twenty two. . . Active signal transmitting unit

twenty three. . . Reset signal receiving unit

100. . . Communication system

111. . . First data signal line (serial data)

112. . . First active signal line

113. . . 1st reset signal line

Claims (12)

A communication system is a communication system including a first communication device, a second communication device, and a plurality of third communication devices that communicate with the second communication device, wherein the first communication device includes a communication unit, a data signal line communicating with the second communication device; the active signal receiving unit receiving the active signal via the first active signal line, the active signal indicating whether the second communication device is compatible with the first An active state in which the communication device communicates; and a reset signal transmitting unit that transmits a reset signal to the second communication device when the second communication device is not in an active state; and the second communication device includes The communication unit communicates with the first communication device via the first data signal line; the active signal transmitting unit transmits the active signal via the first active signal line; and the reset signal receiving unit receives the signal When the reset signal is received, the communication unit of the second communication device is reset, wherein the communication unit of the first communication device passes through the first data signal line. Transmitting, to the second communication device, a reset request including device identification information for identifying a third communication device to be reset among the plurality of third communication devices; wherein the second communication device is The communication department will identify with the device The third communication device corresponding to the information is reset, and the device identification information is included in the reset request received via the first data signal line. The communication system according to claim 1, wherein the reset signal transmitting unit of the first communication device transmits the first reset signal line via the first reset signal line when the second communication device is not in an active state. Transmitting a reset signal to the second communication device; and the reset signal receiving unit of the second communication device receives the reset signal via the first reset signal line, and the aforementioned second communication device The communication department is reset. The communication system according to claim 1 or 2, wherein the periodic frequency of the data signal of the first data signal line is lower than the first active signal line. The communication system according to the first or second aspect of the invention, wherein the communication unit of the first communication device transmits the first data signal line via the first data signal line when the second communication device is in an active state. Sending a reset request to the second communication device for instructing resetting of at least a portion of the second communication device; and the communication portion of the second communication device is received via the first data signal line When the reset request is made, the circuit forming the reset target in the second communication device is reset. The communication system according to claim 4, wherein the communication unit of the first communication device is in the active state via the first data signal line when the second communication device is in an active state The second communication device transmits a reset request including circuit identification information for identifying a circuit to be reset, and the communication unit of the second communication device resets a circuit corresponding to the circuit identification information. The circuit identification information is included in a reset request received via the first data signal line. The communication system according to claim 1, wherein the communication unit of the second communication device communicates with each of the plurality of third communication devices via each of the plurality of second data signal lines; The communication device further includes a reset signal transmitting unit that transmits a reset signal to each of the plurality of third communication devices via each of the plurality of second reset signal lines; each of the third communication devices includes: The communication unit communicates with the second communication device via the second data signal line; and the reset signal receiving unit transmits the reset signal when the reset signal is received via the second reset signal line The communication unit of the device performs resetting; the communication unit of the second communication device transmits a reset signal to the third communication device corresponding to the device identification information via the second reset signal line, and the device identification information includes In the reset request received via the first data signal line. A testing device is a testing device for testing a component to be tested, comprising: a plurality of testing modules for testing the components to be tested; a control device for controlling the test of the tested component by the plurality of test modules; and a relay device for relaying communication between the control device and the plurality of test modules; and The device includes: a communication unit that communicates with the relay device via the first data signal line; and the active signal receiving unit receives the active signal via the first active signal line, the active signal indicating whether the relay device is An active state capable of communicating with the control device; and a reset signal transmitting unit that transmits a reset signal to the relay device if the relay device is not in an active state; and the relay device includes The communication unit communicates with the control device via the first data signal line; the active signal transmitting unit transmits the active signal via the first active signal line; and the reset signal receiving unit receives the heavy signal In the case of the signal number, the communication unit of the relay device is reset, wherein the communication unit of the control device passes through the first data signal line The relay device transmits a reset request including module identification information, where the module identification information is used to identify a test module forming a reset object among the plurality of test modules, wherein the communication unit of the relay device Will be relative to the module identification information The aforementioned test module is reset, and the module identification information is included in the reset request received via the first data signal line. The test device according to claim 7, wherein the reset signal transmitting unit of the control device is in the middle of the reset signal by the first reset signal line when the relay device is not in an active state. The reset signal is transmitted by the device; and the reset signal receiving unit of the relay device resets the communication unit of the relay device when receiving the reset signal via the first reset signal line. A communication device is a communication device that communicates with another communication device, comprising: a communication unit that communicates with the other communication device via a first data signal line; and an active signal receiving unit via the first active signal a line for receiving an active signal, the active signal indicating whether the other communication device is an active state capable of communicating with the communication device; and a reset signal transmitting portion, wherein the other communication device is not in an active state In the case where the reset signal is transmitted to the other communication device, the communication unit transmits a reset request including the device identification information to the other communication device via the first data signal line, and the device identification information is used for identification. a third communication device that forms a reset target among the plurality of third communication devices that communicate with the other communication device, wherein the other communication device further performs the third communication device corresponding to the device identification information Reset, the device identification information is included before the pass The reset request received by the first data signal line. A communication device is a communication device that communicates with another communication device, comprising: a communication unit that communicates with the other communication device via a first data signal line; and an active signal transmission unit that passes the first active signal Sending an active signal to the line; and resetting the signal receiving unit to reset the communication unit of the communication device when receiving the reset signal, wherein the communication unit passes through the first data signal line The other communication device receives a reset request including device identification information, and the device identification information is used to identify a third communication device that forms a reset target among the plurality of third communication devices that communicate with the other communication device, wherein The communication unit resets the third communication device corresponding to the device identification information, and the device identification information is included in a reset request received via the first data signal line. A communication method for a communication system including a first communication device, a second communication device, and a plurality of third communication devices that communicate with the second communication device, wherein the communication unit of the first communication device and The communication unit of the second communication device communicates via the first data signal line, and the active signal transmitting unit of the second communication device transmits an active signal via the first active signal line, the active signal indicating the second communication Whether the device is in an active state in which communication with the first communication device is possible, The active signal receiving unit of the first communication device receives the active signal through the first active signal line, and the reset signal transmitting unit of the first communication device is not in the active state of the second communication device. In the case where the reset signal is transmitted to the second communication device, and the reset signal receiving unit of the second communication device receives the reset signal, the communication unit of the second communication device is reset. The communication unit of the first communication device transmits a reset request including device identification information to the second communication device via the first data signal line, and the device identification information is used to identify the plurality of third communication devices. The third communication device that forms the reset target, wherein the communication unit of the second communication device resets the third communication device corresponding to the device identification information, and the device identification information is included in the first data via the first data The signal line is received in the reset request. A test method for testing a test device of a test component, wherein the test device includes: a plurality of test modules for testing the tested component; and a control device implemented by the plurality of test modules The test of the device under test is controlled; and the relay device relays communication between the control device and the plurality of test modules; and the communication portion of the control device and the communication portion of the relay device are Communication with the first data signal line, And the active signal transmitting unit of the relay device transmits an active signal via the first active signal line, the active signal indicating whether the relay device is in an active state capable of communicating with the control device, and the foregoing control The active signal receiving unit of the device receives the active signal through the first active signal line, and the reset signal transmitting unit of the control device sends the relay device to the relay device if the relay device is not in an active state. Transmitting a reset signal, and the reset signal receiving unit of the relay device resets the communication unit of the relay device when receiving the reset signal, wherein the communication unit of the control device transmits the Transmitting, by the first data signal line, a reset request including module identification information, wherein the module identification information is used to identify a test module forming a reset object among the plurality of test modules, wherein the foregoing The communication unit of the relay device resets the test module corresponding to the module identification information, and the module identification information is included in the first data signal line. Received in the reset request.