Modbus randomly failed message

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28 Oct 2010 12:47 #4928 by 315john
I am using Modbus TCP and recently added some read registers.... i randomly get a modbus failed message and have to restart emc2 to establish a communucation link. how do i determine the cause of the problem? I am connected to a GE 90-30 PLC

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29 Oct 2010 06:04 #4954 by cmorley
What version of EMC are you using. Recently Modbus was updated to improve things.

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29 Oct 2010 14:17 #4961 by 315john
I am using the installed version that comes with Ubuntu 10.04. I know that classic ladder has a newer version but how do i install it? I did figure out my problem was a bad ethernet cable.

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