PKS C300 output card failure
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In the PKS C300 system, the solenoid valve lost power suddenly during operation. Checks showed that the control program was functioning properly and the solenoid valve module was generating output, but there was no output from the DO channel. I wonder if anyone has encountered similar problems – is it due to the circuit being grounded, or caused by a short circuit? Too much load?
It’s normal for a channel to be faulty; the cause needs to be investigated on-site, and outputs generally come with protection mechanisms
Similar problems have occurred before as well; the solenoid coils used at that time had a high resistance, with a power rating of 7W. The same is true for this phenomenon: it works properly after switching to a low-power solenoid valve (3W), indicating that it’s not the channel that is faulty.
The fault symptom is that an external fault initializes the upper-level module; however, this phenomenon persists even after replacing the solenoid valve, while it operates normally after changing the channel.