1734-aentr

Hello Everyone,

I have a 1734 AENTR connected to a 1756-ENBT ethernet card. The AENTR has 10 safety I/O modules and then 2 discrete I/O modules. I am getting an error on the safety modules that flashes back and forth between different modules of Module Fault (Code 16#0301) Connection Request Error: Out of buffer memory.
I was told that the max number of connections is 20 per an AENTR. With the AENT counting as 1, safety cards counting as 2 each, and the discrete modules counting as 1 each.
Ive done a bit of reading and the AENTR should be able to support up to 63 modules. Which doesn't make sense with the 20 connection limit. I have everything set to rack optimization. I have read somethings on the max number of CIP connections as well, but don't quite know what all that means.
Does anyone have any help on this? Should I be able to get the AENTR to work with the 10 safety modules and 2 discrete modules?

Thanks in advance,
Dennis

According to
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1734-um013_-en-p.pdf

Page 75- PointI/O Safety Modules do not use Rack Optimization

so you will have to re-configure the modules for "None" type connections.

Even this is accomplished, I am afraid you are exceeding the allowed number of CIP connections (20) for the 1734-AENTR module.
http://literature.rockwellautomation.com/idc/groups/literature/documents/at/safety-at022_-en-p.pdf Page 30.
Each Safety Module consumes 2 connections (one for the I/O points data and one for for the safety/test circuitry data) , the two discrete modules 1 each and the AENTR module one itself; the total within your application will be 23.
If you are not using any of the safety input modules test outputs, within the respective module's RSL5K configuration applet, Properties choose Change and then, under Output Data, select None thus "releasing" one used-up connection; if you could accomplish this for three safety Input modules you might just establish functionality.