Should the Modbus master (eg Xenta 913) also be terminated if it is in the middle of the Modbus bus?

Issue

Should the Modbus master (eg Xenta 913) also be terminated if it is in the middle of the Modbus bus?

Product Line

TAC Vista

Environment

  • Xenta Server with Modbus capabilities
  • Xenta 511, 527, 701, 711, 721, 731, 913

Cause

There are a number of installation possibilities/restrictions that may mean that the Modbus master does not always end up at one of the ends of the communication field bus.

Resolution

Only the ends of the bus should be terminated (see below).

 

More information is available for Modbus.org at the following link:

Modbus over serial line specification and implementation guide V1.02.