JUMO 705001 mTRON T - Central Processing Unit Operating Manual - Manual (Page 78)

6 Configuration
78
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 13
 Chapter 11 "Retrofitting interfaces", page 143
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 114
 Chapter 8.3 "Modbus frames for writing", page 115
Communication through the Modbus is described in more detail in the separate Modbus inter-
face description (B 705001.2.0).
Setup dialog
Parameters
Parameter Selection/settings Description
Protocol Modbus slave Modbus RTU (central processing unit as
Modbus slave)
The device address is assigned dynami-
cally during hardware configuration.
Modbus master Modbus RTU (central processing unit as
Modbus master)
Baud rate Baud rate with which the interface is operated.
9600 9600 baud
19200 19200 baud
38400 38400 baud