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sashaleiz

CQM1-CPU43 Output OFF Bit SR 252.15

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I am from AB world, but now am facing up with Omron PLC troubleshooting. One of my machines with Omron CQM1-CPU43 went out of work, because of low batteries in the PLC, program was lost and PLC stock with Error” Low battery” Is my luck, program was stored on EEPROM card, so I replaced the battery and reload program back to PLC, but after that other light on PLC comes up ”Output Inhibit Bit” is ON and all outputs are OFF. Operational manual sated just “turn back to OFF position, the “Output OFF Bit SR 252.15” and nothing else, where and how I can do it. I can not find in the CX programmer software the way to switch this bit, neither one rung in the program consist this bit, I really don’t know how solve this problem. Could you, please advice?

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I have a little experience with CQM, but more with other Omron plcs like CJ1 etc, but as I can see, when you open cx-programmer, you have in a list of symbols which are automatically created by the cx-programmer, a symbol named P_Output_Off_Bit. it's address is 252.15, this should be what you're looking for. drag it to a monitor window (View -> Windows -> Watch) and see its state, it should be ON since all your outputs are OFF. You can manually reset it from this window, right click - > Set Off. Haven't dealt with this in real life, but you could try this. regards Edited by tashinz

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Hi, tashinz. Thanks for prompt replay, as I understood - my PLC should be in running Mode, not Program,right? second one, to perfom the operation, i need go to online mode to perfome everything, you sugested. Will try and let you know. Thanks a lot, Alex.

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The PLC will need to be in Monitor mode.

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Indeed, PLC should be in RUN or MONITOR mode (monitor mode one use when there is operator panel / SCADA communicating with PLC). So you go online from cx-programmer and do the above steps. regards

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If the PLC is in RUN mode, you will not be able to set the bit ON in the watch window. You will have to be in MON mode. (CX-Programmer will likely ask you to change to monitor however if you try to do it in RUN mode, so this point is somewhat trivial).

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Thanks for everybody, problem got fixed now. But after all outputs was released and machine start working, some of outputs and function still not working. Looks like some parameters is missing, after I restored program from the EEPROM card. Machine has an HMI, but nobody knows what to change.One of the most critical - the Stop Bottom not working any more, in the stand by position, the input from the Stop Bottom(INC) is present in input module, but after machine start moving by the regular Start bottom - the input from the Stop bottom disappear from the Input module and only one way to stop machine, is E-Stop. Any suggestions,please? P.S.How can I place the sample PLC code, that I pulled out from the EEPROM card, here?

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