Modbus RTU Required Documents

You should have the following document available when configuring a Series Six for Modbus RTU communications:

Series Six Programmable Controllers Data Communications Manual (GEK-25364)

You should have the following document available when configuring a 3720 ACM Electronic Power Meter for Modbus RTU communications:

3720 ACM / Modbus Serial Communications Protocol

For all other programmable controllers, you should have the documentation for the controller available.