IE3100-8T2C-E in a Rockwell PLC's IO tree

[ewieters]

I have uploaded the EDS file from the switch and added it to my PLC programs IO tree. No matter what choice i select for the connection i get error code 16#0126 Connection Request Error: Invalid configuration size. Has anyone here successfully used a Rockwell PLC to monitor the IE-3100-8T2C-E?

Thanks in advance.

[Enes Simnica]

The error #16#0126 usually means a mismatch between the EDS file configuration and the module's expected I/O size. For the IE-3100-8T2C-E with Rockwell PLCs:

1. First, download the latest EDS file directly from Cisco's support site for your specific module firmware version. Delete the old EDS from your project and reimport the fresh one.

2. In Studio 5000, verify your I/O configuration exactly matches:

• Input: SS (Cisco:11)
• Output: 8 (Cisco:01)

1. Change electronic keying to "Exact Match" instead of "Compatible"

2. Manually create tags if needed

3. Check firmware versions:

• PLC should be v30 or newer
• IE-3100 should be 1.4.0 or newer

1. After reconfiguring, cycle power to both devices

If it still fails, completely remove the module from your I/O tree and rebuild the configuration from scratch. This often resolves lingering configuration issues.

I've successfully used this module with CompactLogix PLCs before - the key is making sure the tag sizes in Studio 5000 exactly match what the module expects. The error suggests your current configuration is declaring wrong buffer sizes.

-Enes

[ewieters]

I have v35 CompactLogix and CIP version v1.008 in the switch. Cisco firmware v17.17.01

I uploaded the EDS directly from the device through RSlinx. See attached EDS file. Did you add the device as a generic ETHERNET-MODULE ? So far I have only tried adding the device directly (not generic). Can you explain more on step 2?

Thanks