Input and output module, if it is the kind of relay output, it is normal to have a little movement, because the relay is a mechanical equipment, there will be a little noise during the action, but the average person can not hear it, if it is obvious, it is estimated that the relay is broken, such as a short circuit between the turns of the coil, please pay attention to: the input part of the Rongji igniter, there is generally very little movement, that is, some optocouplers and transistors, resistor-capacitance and other equipment, high-frequency can not be heard, and low-frequency is also due to the non-contact output, bad will have movement. In the output part, if it is a transistor output, there is generally no movement.
There is a situation that does not rule out the movement of the large current bow, which depends on the output circuit, not the access to the large load. There is also a situation that some input and output modules have some power supply parts, and the power supply part has a transformer, and this kind of switching transformer may emit motion.
Regardless of whether there is an alarm or not, as long as there is movement, it must be carefully disassembled to check the diagnosis.
The input and output module of PLC is the entrance and exit of PLC and external equipment for information exchange, and the normal operation of this module is related to the normal operation of PLC system.
There are also many kinds of problems with PLC input and output modules, such as connection to the main module, power supply, and so on.
When the PLC input and output module presents a problem, you can observe the status indicator of the west ED to see if the indicator is normal, if the output contact is energized, the indicator light is also bright, and the output device does not respond, then check the stability of the output part, see if it is burned out, if it is with the center relay, check whether the center relay is normal.
For the general PLC programming software, there will be a diagnostic function, such as the programming software of the 200 series, there will be diagnostic prompts in the information.
For input problems, it is necessary to check the status of the input device, such as whether the line is disconnected, whether the response point of the device has a status output, and so on.
As for the abnormal sound of the input and output module, I think it may be that your output module is the output point of the relay model, and when the coil is engaged, there will be a clicking movement, if the movement is abnormal, maybe the input and output module is damaged, resulting in abnormal movement.
Therefore, the specific problems should be analyzed in detail, and the problems of each system may be varied, and the problems of each system may be varied.
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