A
I have 1756-ENBT/A card on a controllogix chasis (with a 1756-L62) messaging with a bunch of other PLC's in the plant. It has been running fine for years but lately been having big problems with communication. The ControlLogix is reading and writing to SLC 5/05's and reading from them too. Also the same SLC 5/05 are writing to and reading from this controllogix processor. While there is no communication problems with the SLC's reading and writing to the ControlLogix, the read and write MSG Instruction in the ControlLogix to the SLCs keeps on giving an error. The Error code (0001-- 0204 Unconnected message timeout). I looked at the 1756-ENBT/A card in the I/O config of the controlLogix and found that the under the module info tab the Internal State is not run mode, it says intead (16#0060) unknown. Also under the port configuration tab it comes up with module not found. Its very weird because I can go online with the controller, its talking to the SLCs and HMI, all the LED's on the 1756-ENBT/A are green. I have attached screen shots of the ENBT. may be some kind soul can help me out here