Monitor the connection status of a 1734-AENT/A Point I/O module in ladder?

Question

I have a 1734-AENT/A Ethernet/IP Point I/O module and rather than checking the box that triggers a major fault on the processor if there's a communication fault, I want to monitor the communication status in the ladder logic and program the fault logic myself. However, I can't seem to find a way to monitor the communication status with the module itself.

There is a tag in the process called

(Module_Name):I.SlotStatusBits0_31 (DINT)

...but:

This only tells me the status of slots that are participating in the "rack optimized connection" and
Slot 0 (the I/O module) is always 1 and doesn't seem to indicate anything useful.

I was wondering, how can I reliably monitor the status of the module in the ladder logic?

Accepted Answer

3

How about using a GSV instruction with the class name module and the instance name pointing to the 1734-AENT module in the IO tree and the attribute fault code.

link

answered Feb 19 '10 at 01:33

Gary F 1
221●4

Thanks Gary, that worked! Note that the destination tag size for the GSV instruction is INT. I ended up using the EntryStatus attribute rather than the FaultCode attribute, masking with only the top 4 bits (16#F000) and testing that it was equal to 16#4000 (Running). Worked like a charm. (Further ref: http://www.iqcontrols.com/Resources/Ref/1756%20Controllogix%20Module%20Object%20from%20general%20Instructions.pdf)

(Feb 19 '10 at 13:14) Scott Whitlock ♦♦

Answer 2

0	yeah you can used the GSV instruction, then module, then define which status you want.. if you used Entrystatus then you can even monitor the health of the module... Ganie link answered Apr 01 '11 at 09:04 Ganie 1

Monitor the connection status of a 1734-AENT/A Point I/O module in ladder?

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