Hi all,
We've encountered a bit of a puzzling issue with an Omron CJ1M-CPU12 PLC on a site. Basically, it's not letting us write configuration changes to the ETN21 card on the rack.
All we want to do is change in the ETN21 is the IP address/subnet mask and add an IP address conversion entry. However, when we download the entire modified PLC program, the ladder code changes are updated but when we read the ETN21 configuration, it is unchanged.
When we try to transfer the ETN21 parameters separately with the 'Transfer[PC to Unit]' option, we get an error message that reads "Mode 11 - cannot download". I haven't been able to find any information on what this message means.
We have tried several spares of ETN21 cards, with different firmware versions (1.4 and 1.5) and we still encounter the same issue. This leads us to believe it is something to do with the Omron CPU. For whatever reason, it is not letting us modify the configuration of the Bus units.
Another thing is there is an identical Omron PLC on another site that has practically the same program and same rack and unit configuration. We were able to download those same program changes to that PLC last week with no issue at all. This makes me suspect some sort of hardware fault as the root of our woes.
Do any Omron experts hear have any idea what could be the possible causes of our issue?
We've encountered a bit of a puzzling issue with an Omron CJ1M-CPU12 PLC on a site. Basically, it's not letting us write configuration changes to the ETN21 card on the rack.
All we want to do is change in the ETN21 is the IP address/subnet mask and add an IP address conversion entry. However, when we download the entire modified PLC program, the ladder code changes are updated but when we read the ETN21 configuration, it is unchanged.
When we try to transfer the ETN21 parameters separately with the 'Transfer[PC to Unit]' option, we get an error message that reads "Mode 11 - cannot download". I haven't been able to find any information on what this message means.
We have tried several spares of ETN21 cards, with different firmware versions (1.4 and 1.5) and we still encounter the same issue. This leads us to believe it is something to do with the Omron CPU. For whatever reason, it is not letting us modify the configuration of the Bus units.
Another thing is there is an identical Omron PLC on another site that has practically the same program and same rack and unit configuration. We were able to download those same program changes to that PLC last week with no issue at all. This makes me suspect some sort of hardware fault as the root of our woes.
Do any Omron experts hear have any idea what could be the possible causes of our issue?