Thank you all for your help.
Kratmel:
I have sb168 = 1, I left that as is.
Flex
The PLC is being polled over a WAN Network about every 2 minutes. I recently found the keep alive settings SI103-106, and set a value of 50 in SI105 I believe for a couple sites to test with. ( I am using socket 2 as it is standard for modbus communications)
Ausman
Going through my WAN connection I can still get OPLC information and go online with the PLC (so I know the WAN connection is okay), but no modbus communications seem to make it to the PLC. I watch the corrosponding SDW and do not see the soclet 2 RXD total session increment ever.
So my fix was to go online with the PLC and reinitialize the ethernet card, socket 2, and the modbus config block
No other devices such as VFDs or anything that I would guess make a lot of noise.