ktuncan
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You could do something like this
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NSJ-Holding Bit from HMI on after power cycle
ktuncan replied to Rob Nelson's topic in CX-Programmer
You could use KEEP instruction with H or D registers that will maintain status after power interruption. -
Sorry for the late reply. I reviewed your code and in simulation mode it actually worked for me. But I moved reset rung to 23 after moving D30101 to D5001. PLC starts executing your rungs top to bottom. In your case you are setting 356.02 at rung 14. Moving to D5001 at rung 23 and resetting at rung 12. You are resetting before moving. This all happens in milliseconds and probably that is the reason.
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Could you share a screen shot of your code?
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Peter, Could you try something like below? Just and idea
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Peter, Looks like you are moving that memory continuously for a moment after resetting that memory. Try rising edge with your condition.
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I had a similar issue before. I did modified the HMI program and didn't change anything with the communication but somehow it was trying to communicate thru Serial Port which was set as Ethernet/IP. I did go into admin mode after dumping the program and in communication settings assigned the serial ports as not used.
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You may disable the extensions tab
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If all buttons are not working you probably change something with the communication settings that is not communicating with PLC.