GE Fanuc Modbus Memory Areas

paulowen1

Member
Join Date
Jan 2004
Posts
2
I have a Honeywell DCS as a Modbus Master polling a GE Fanuc 90-70 PLC. I need to know what the Modbus address corresponds to the Memory area in our 90-70 PLC.

e.g Modbus 34008 is this reading from %AQ or %AI ???
Modbus 17001 is this reading from %Q or %I ???
Modbus 06001 is this reading from %M ????
Modbus 43001 is this reading from %R ????

Please could some help me!!
many thanks

Paul
 
Modbus 0xxxx corresponds to %Q ouputs. Modbus 1xxxx corresponds to %I inuts. Modbus 4xxxx corresponds to %R registers. Modbus 3xxxx corresponds to %AI analog inputs. %M memory in the 9070 is not directly accessible via Modbus commands.
 

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