kolyur
Lifetime Supporting Member + Moderator
We recently installed a new machine at a customer's site with a Micrologix 1100. Afterwards we found a bug in the program which has since been corrected. The problem now is how to get the corrected program onto the customer's machine, preferably without a site visit. The customer has no experience with PLCs so just emailing the new program is not an option.
I came across the 1763-MMI module and it seems like it might do what we need but the manual is somewhat vague about how it works. From what I can tell, I would load the updated program onto the MMI with RSLogix and set the S:1/11 "Load Memory Module Always" bit. Then mail to the customer, he sticks it in, turns on power and voila, he's running the new program. But what isn't clear to me is whether the module has to remain there forever. Does the program get transferred to the NV memory of the PLC? Or would removing it cause the PLC to revert to its old program? There's a slight possibility that the bug in the old program could cause the machine to damage itself, so ideally I'd like to be able to apply a permanent fix.
I came across the 1763-MMI module and it seems like it might do what we need but the manual is somewhat vague about how it works. From what I can tell, I would load the updated program onto the MMI with RSLogix and set the S:1/11 "Load Memory Module Always" bit. Then mail to the customer, he sticks it in, turns on power and voila, he's running the new program. But what isn't clear to me is whether the module has to remain there forever. Does the program get transferred to the NV memory of the PLC? Or would removing it cause the PLC to revert to its old program? There's a slight possibility that the bug in the old program could cause the machine to damage itself, so ideally I'd like to be able to apply a permanent fix.