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from the Automation List department...
Modsoft Communication Error
Software, including programming, OS issues, etc. topic
Posted by Damon Belfield on 27 October, 2007 - 1:20 am
I have mananged to connect to a Quantum PLC via Modbus using Modsoft on a Windows XP laptop.

Whenever I try to view the status online I get the following error:

984 - Not logged in or a user is logged in on another port. Modbus Error Code 169

What does this error mean and how can I avoid it in the future?

Many thanks.

Damon


Posted by Damon Belfield on 30 October, 2007 - 1:07 am
Problem solved, turned out to be a faulty programming lead.

Thanks.

Damon


Posted by Luis Villalva on 23 November, 2007 - 11:31 am
I have the same problem but with a PLC Modicon Compact 984. Please Tell me how did you solve that problem.

Thank you


Posted by Morten on 8 May, 2008 - 11:18 pm
I have that problem too.
Any suggestions?

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