SLC messaging with a ControlLogix redundant system

[Alfredbeni]

I have a redundant ControlLogix being set up. This program reads a value from a remote site which happens to be SLC PLC. Rockwell mentions SLC messaging is not compatible with the redundant ControlLogix system. Is there a way moving forward? I require this remote site value for proper functioning of the program code. Any help is much appreciated.

 

[Contr_Conn]

Logix 5580 (L8xE) redundancy does not support SLC messaging.
You should use another PLC to read that data then produce to Redundancy. This PLC can be a stand along controller or reside in the 1756 IO chassis.

 

[robertmee]

Use a bridge controller. The redundant PLC messages the Bridge controller via EIP and the bridge controller can talk to the SLC (assuming 505) via the native PCCC. You can also do this with DH+ if an older SLC 504.

Edit: Conn is a faster typer

 

[Macbeth]

Currently attempting same situation. My SLC5/05 is a third party device, not actually a SLC.
It seems as I should be able to build a "Generic CIP" message and move forward. I can find all I need to know to do it with Modbus, but nothing on SLC messaging as "Generic CIP"..
My remote device does have Modbus Available. Also I have a L306 as a bridge.
Anyone know of using a Generic CIP for SLCs?

 

[Contr_Conn]

SLC typed message formats described in 1756-PM020.
Specifically page 79 has SLC read A2