Logix5000 Messages to different IP range

Hi All,
I am trying to write a value from AB control Logix5000 to another one with MSG command using "CIP Data table write" throw Ethernet.

one PLC IP Address is 123.123.123.101 and the other PLC IP address is 10.250.6.54. I use the same set-up for sending message to other plc with same ip range; i.e. from 123.123.123.101 to 123.123.123.51 which is working fine but when I try to send same message to 172.22.5.11 I get an error code 16#0000_0204.

the communication path when sending to 123.123.123.51 is "ethernet, 2, 123.123.123.51 , 1, 0" (Working fine)

the communication path when sending to 10.250.6.54 is "ethernet, 2, 10.250.6.54, 1, 0" (getting error message 16#0000_0204)

all PLCs are in the same network

I think this issue because the ip address not in the 123.123.123.xxx range. is there a way to get around this without changing the IP address (10.250.6.54) to 123.123.123.xxx range?

Thanks

A Network Address Translation (NAT) Device should do the trick for you.

1: Using a gateway/router.
2: Using 128.0.0.0 as subnet (which I do not recommend)


EDIT: or what Jordan said....

You could use a NAT translation device like Jordan Suggested or use a router or modify your subnet mask as Jeebs said but I would not go the modified mask route either.

You can also use a layer 3 switch which may be cheaper than a full router solution.

My suggestion would be to just use another 1756-ENBT if you have a spare slot and set it up for the other network. This would likely be the most simple solution and maybe the most cost effective also. This would also be easier to troubleshoot.