Modbus RTU Hardware Configuration Requirements

The Modbus RTU protocol allows one master and up to 247 slaves on a common line. In CIMPLICITY software, the Modbus RTU Communications Enabler is the master.

Many configurations limit the number of slaves to a smaller number. For example, Gould's J478 modem restricts the number of slaves to 32. Contact your hardware vendor for information about the number of slaves that your hardware configuration can support.

More information

Modbus RTU hardware installation.

Modbus RTU serial port configuration.

About Modbus RTU.