uptown47
Lifetime Supporting Member
Hi all,
Correct me if I'm wrong but if I hold down the MRES switch on a Siemens 300 series PLC and wait until the amber light stops flashing, then release the switch and hold it down again quickly (causing the amber light to blink rapidly) then this should reset the memory?
This doesn't seem to be working on two different 313C PLC's. I do an "overall reset" but when I interrogate the PLC the program blocks (eg. FC1, FC2 etc) are still in there?
Does the overall reset not clear these out or are they held somewhere that's not being erased?
How do I quickly erase these blocks?
Many thanks
Correct me if I'm wrong but if I hold down the MRES switch on a Siemens 300 series PLC and wait until the amber light stops flashing, then release the switch and hold it down again quickly (causing the amber light to blink rapidly) then this should reset the memory?
This doesn't seem to be working on two different 313C PLC's. I do an "overall reset" but when I interrogate the PLC the program blocks (eg. FC1, FC2 etc) are still in there?
Does the overall reset not clear these out or are they held somewhere that's not being erased?
How do I quickly erase these blocks?
Many thanks