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Old July 17th, 2007, 10:42 PM   #1

ettikudiappan is offline
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Join Date: Apr 2002
Location: Singapore
Posts: 131
AB 1734-AENT POint IO issue

We are facing a point IO communication issue intermittently, once in 3 days. While running, the Network Status LED turns flashing red and the Point Bus status LED turns solid red. This is a symptom of wrong configuration of the number of ASCII modules connected to the point IO, but if this were the case the Point IO should always fault.

I changed the Point IO module itself (1734-AENT), the problem occured again. Then we changed the power supply, also same issue.

The Point IO has 5 modules connected to it, 2 RS485 and 3 RS232 modules. The RS485 modules are not used.

Anybody else faced the same issue? We have other POint IO in the plant that work perfectly well.
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