Digital quantity module channel detection device

Abstract

The utility model discloses a digital quantity module channel detection device, which comprises a relay, normally open auxiliary points are connected to an eighth terminal and a twelfth terminal of a wiring terminal of the relay, coils are connected to a fourteenth terminal and a thirteenth terminal of the relay, a DC 24V + is connected to a common end at the joint of the normally open auxiliary points and the twelfth terminal, and a DC power supply is connected to the common end. The DC24V-is connected to a common end at the joint of the coil and the No.13 terminal; input channel ends on the input module are all connected in parallel and are connected with an eighth terminal of the wiring terminal; output channel ends on the output module are all connected in parallel and are connected with a No.14 terminal of the wiring terminal; the input module and the output module are respectively provided with a programmable processor.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical automation equipment, in particular to a digital quantity module channel detection device. Background Art

[0002] Generally, the DI / DO modules of newly purchased PLC products are only inspected for product model and appearance, and module problems cannot be discovered in time. Similarly, for DI / DO modules of PLC products that have been stored for too long and some DI / DO modules that have been removed from production lines after modification, there is no reliable, available, and convenient detection method to verify the quality of module channels before they are put back online. Therefore, the quality inspection of various series of DI / DO modules by users before they are put online has become an urgent problem to be solved. Utility Model Content

[0003] In view of the above technical problems, the utility model provides a digital quantity module channel detection device.

[0004] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A digital quantity module channel detection device, comprising:

[0006] Relay, the No. 8 and No. 12 terminals of its wiring terminals are connected to the normally open auxiliary point, the No. 14 and No. 13 terminals are connected to the coil, DC24V+ is connected to the common terminal where the normally open auxiliary point and No. 12 terminals are connected, and DC24V- is connected to the common terminal where the coil and No. 13 terminals are connected;

[0007] Input module, all input channel terminals on it are connected in parallel and connected to terminal 8 of the wiring terminal;

[0008] Output module, all output channel terminals on it are connected in parallel and connected to terminal 14 of the wiring terminal;

[0009] Wherein, both the input module and the output module are provided with a programmable processor.

[0010] The beneficial effects of the utility model are:

[0011] 1. The platform of the utility model is simple to build. Only one DI / DO module of the same type needs to be configured in the hardware configuration. The front connection terminals of the modules are connected in parallel except for the module power supply. The wiring is simple. Since the front connection terminals are detachable, more modules can be detected by replacing the modules.

[0012] 2. The utility model only needs to detect the channel of a single input / output module to determine whether the channel is abnormal.

[0013] 3. The utility model can be extended to DI / DO modules of PLCs of various series of control systems.

[0014] 4. The utility model uses one relay to complete the detection of the input and output module channels, the wiring of the relay and the module is simple, and the construction of the experimental environment can be easily realized.

[0015] 5. The utility model can avoid abnormalities in the module soon after it goes online, and complete necessary tests offline. Moreover, the test time is flexible and can be set by programmers according to actual conditions to complete the reliability performance test and detection of the module.

[0016] 6. The hardware configuration of the utility model only requires one power supply, a programmable processor, an input module, an output module and a relay. All channels of the input module are connected to the same normally open auxiliary point of the relay. Each action of the relay will cause the input channel to be turned on and off at the same time. All channels of the output module are connected to the coil of the relay. The output channels are output one by one in sequence by programming. The input signal feedback of the normally open auxiliary point is used to detect and judge the on-off status of the output channel. The same model of DI / DO module only needs to be configured with a single input and output. By replacing the module, the detection of the quality of each module channel can be realized. Programming also only needs to program a single input and output module, and a cyclic detection program is compiled to count the on-off of the input module channel in a cycle. Since the number of on-offs of all channels of the input module in a cycle is fixed and the same, the quality of the input module channel can be judged by counting the on-off of the channel. Similarly, the quality of a single output channel can be located by comparing the program output and the relay pull-in state of the output module one by one in a single cycle. The repeated operation of such a cyclic detection program can effectively detect and judge the quality of the input and output module channels through the detection of a time period. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0018] Figure 1 This is the relay wiring schematic diagram of the utility model.

[0019] Figure 2 This is the wiring schematic diagram of the input module of the utility model.

[0020] Figure 3 This is the wiring schematic diagram of the output module of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0022] like Figure 1 As shown, a digital quantity module channel detection device includes: a relay 8, whose terminals 8 and 12 of the wiring terminal 9 are connected to the normally open auxiliary point 3, the terminals 14 and 13 are connected to the coil 6, DC24V+ is connected to the common end of the connection between the normally open auxiliary point 3 and the terminal 12, and DC24V- is connected to the common end of the connection between the coil 6 and the terminal 13; an input module 1, whose input channel ends are all connected in parallel and connected to the terminal 8 of the wiring terminal 9; an output module 4, whose output channel ends are all connected in parallel and connected to the terminal 14 of the wiring terminal 9; wherein a programmable processor is provided on both the input module 1 and the output module 4. The coil 6 is DC24V+ through the channel of the output module 4 to realize the attraction and release of the relay 8, and the channels of the output module 4 are connected together, and the output of a single channel can be realized through programming. Since the module adopts optical coupling isolation inside, it will not affect the disconnection state of other channels. After relay 8 is energized, the normally open auxiliary point 3 is closed. Since the input signal is also connected in parallel, the input signal will be turned on and off at the same time. By synchronously comparing the input feedback signal and the output channel output, the output channel can be detected and abnormal judgment can be realized. Since the input signal is a synchronous action, the quality of the input channel can be judged by the on-off count of the input signal.

[0023] When the utility model is used, Figure 2 and 3 As shown, taking AB's 1756-IB16 and 1756-OB16E modules as an example, connect IN-0 to IN-15 of 1756-IB16 module 1 in parallel, connect terminal 8 of terminal 9 to the IN-0 to IN-15 input channel end of the front connection terminal 2 of 1756-IB16 module 1, and connect DC24V- to GND-0 and GND-1 terminals of the front connection terminal 2 of 1756-IB16 module 1. Working principle: When relay 8 is in the energized state, the normally open auxiliary contact 3 leads DC24V+ from terminal 8 to IN-0 to IN-15 of 1756-IB16 module 1. Since IN-0 to IN-15 are connected in parallel, the channels of 1756-IB16 module 1 are turned on and off at the same time. The on and off of the channels of 1756-IB16 module 1 are counted, and the count can be used to determine whether the channel is abnormal.

[0024] like Figure 3As shown, DC24V+ is connected to DC0(+) and DC1(+) of the front connection terminal row 5 of 1756-OB16E, OUT-0 to OUT-15 are connected in parallel to terminal 14, DC24V- is connected to RIN OUT-0 and RIN OUT-1 of the front connection terminal row 5 of 1756-OB16E, and DC24V- is connected to terminal 13. Working principle: 1756-OB16E outputs one at a time from OUT-0 to OUT-15 in sequence. The output condition is that the next output is delayed after the last release of relay 8 (the feedback of the synchronous input channel changes from 1 to 0). One output cycle is that each output channel is turned on and off once. The feedback signal of input module 1 and the output action are synchronized to determine whether the output channel is abnormal.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A digital module channel detection device, characterized in that: include: Relay (8), the No. 8 and No. 12 terminals of the wiring terminal (9) of which are connected to the normally open auxiliary point (3), the No. 14 and No. 13 terminals are connected to the coil (6), DC24V+ is connected to the common terminal where the normally open auxiliary point (3) and the No. 12 terminal are connected, and DC24V- is connected to the common terminal where the coil (6) and the No. 13 terminal are connected; An input module (1), wherein all input channel terminals on the input module (1) are connected in parallel and connected to terminal No. 8 of the wiring terminal (9); The output channel terminals of the output module (4) are all connected in parallel and connected to the fourteenth terminal of the wiring terminal (9); Wherein, both the input module (1) and the output module (4) are provided with a programmable processor.

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