Hi All. I can write an N7 value to a modbus register in an Automation Direct Servo but I can't read a holding register to an N7 address. I've done this in the past without any issues but can't do it now with the same setup I used to use. Does anybody know of and issues with RSLogix 500 v11?
MSG Instruction With RSLOGIX500 v.11.00.00 and ML1400 - Can Write But Can't Read
- Thread starter Norml
- Start date
Ken Moore
Lifetime Supporting Member
Can you read modbus value using one of the may modbus tools?
Just to ensure it is possible. That you have the correct register etc..
Just to ensure it is possible. That you have the correct register etc..
OkiePC
Lifetime Supporting Member
Ethernet or serial?
If serial, double check that both transmit and receive wires are properly terminated.
If serial, double check that both transmit and receive wires are properly terminated.
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