This may sound horribly amateurish, but I haven't ever run across this issue with a SLC. PLC-5 yes ... but not a SLC.
I have a SLC 5/03 that once in a blue moon would fault. Sometimes due to an error in the machine's production recipe. Anyway, what happens is when the fault occurs, the outputs are held in their last state and the operator is unable to shut down parts of the process. ALL the SLC's I have will turn OFF ALL outputs when a fault occurs. I've never needed to look at this, until now, with this particular machine. Looking at the process carefully, I can find no reason why the OEM (now out of business) would have set up the SLC to keep the outputs in their last state upon a processor fault condition.
Any assistance in this matter would be greatly appreciated.
- Tony
I have a SLC 5/03 that once in a blue moon would fault. Sometimes due to an error in the machine's production recipe. Anyway, what happens is when the fault occurs, the outputs are held in their last state and the operator is unable to shut down parts of the process. ALL the SLC's I have will turn OFF ALL outputs when a fault occurs. I've never needed to look at this, until now, with this particular machine. Looking at the process carefully, I can find no reason why the OEM (now out of business) would have set up the SLC to keep the outputs in their last state upon a processor fault condition.
Any assistance in this matter would be greatly appreciated.
- Tony