Serial Interface - JUMO mTRON T Operating Manual

6.7

Serial interface

Each serial interface (Com1, Com2) can be executed with two different interface cards in the
central processing unit (for option, see order details). One RS232 interface and one RS422/
485 interface are available. The type of interface card used is automatically identified by the
central processing unit (hardware ID).
 Chapter 1.4 "Identifying the device version", page 14
 Chapter 11 "Retrofitting interfaces", page 159
Both serial interfaces can be operated as a master or slave with the Modbus protocol (Modbus
RTU).
For more information on using the serial interface with the Modbus protocol, see:
 Chapter 8.2 "Modbus frames for reading", page 120
 Chapter 8.3 "Modbus frames for writing", page 121
Communication through the Modbus is described in more detail in the separate Modbus inter-
face description (B 705001.2.0).
Setup dialog
Parameters
Parameter
Protocol
Baud rate
Selection/settings
Modbus slave
Modbus master
Baud rate with which the interface is operated.
9600
19200
38400
6 Configuration
Description
Modbus RTU (central processing unit as
Modbus slave)
The device address is assigned dynami-
cally during hardware configuration.
Modbus RTU (central processing unit as
Modbus master)
9600 baud
19200 baud
38400 baud
81