Omron CPM2A-60CDT1-D High Speed Counter

[jmartin9]

Hi Folks. I have a problem with an Omron CPM2A-60CDT1-D High Speed Counter. It had been working well, the problem arose when a very minor program change was downloaded to the PLC (only added one n/c contact to one rung) and now it appears that the high speed counter function has been lost. The original fully functioning program was re-downloaded and the problem persisted. I am not where this PLC is at the moment - I was on the phone with a technician who was online with this PLC and we went through the high speed counter settings (in PLC settings) and they appear to be the same settings as they were when I programmed this PLC in the first place. I had him change the settings, transfer them, then change them back to the original and transfer them again but this made no difference. The program was written with Cx-Programmer V2.0. The download at new location was done with V5.0. Could there be an incompatibility issue? The machine is acting exactly like the high speed counter is not functioning which is why I suspected that the high speed counter settings somehow got changed during the download. The high speed counter is reset with a proximity sensor through 0.00 and the settings are >'use as high speed counter' >'Zphase and software reset' >'Differential phase mode'. Attached is the original program. Thanks!

 

[drbitboy]

It had been working well, the problem arose when a very minor program change was downloaded to the PLC (only added one n/c contact to one rung) and now it appears (unrelated part broken, reloading original did not work, tale of woe, etc.)

I hate technology. I hate it with a burning passion.

I cannot help, but do know that I feel your pain.

 

[sbaum]

Just a random shot here, but did you cycle power to the processor after re-downloading the proper settings?
I haven't touched a CPM2A in ages, but often the Omron PLC settings require a power cycle to activate.
Next I'd be double checking the actual I/O from your encoder. I know they just made a program change, but never know what was bumped when connecting the programming cable.

 

[jmartin9]

Hi Sbaum. I did ask the tech to do exactly this but I'm not sure he did and it could very well be the problem. I have to fly to Tennessee now to fix this so hopefully it will be as simple as that. This and any other ideas are much appreciated!