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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: [S7plc EPICS driver] REAL type record jumps to zero |
| From: | "Steven M. Hartman" <[email protected]> |
| To: | "Martin L. Smith" <[email protected]> |
| Cc: | "[email protected]" <[email protected]> |
| Date: | Tue, 27 Sep 2011 15:42:13 -0400 |
Martin L. Smith wrote:
I have other PLCs that I'm talking to though from the same machine just a different soft IOC that do not have this same problem. For some reason it is only this 1 PLC.
Marty--Which ethernet module and firmware version are you using on your control logix PLCs? We've seen some buggy firmware versions which caused the PLC to occasionally drop its ethernet connection. Scanned ai records with ether_ip show a value of 0.0 with a READ error when the network connection is dropped.
-- Steven Hartman [email protected]