Mx350_01a_oi_e.docx / Nov-19
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Modbus RTU Interface
The Modbus interface of the touchMatrix
®
series is a standard Modbus RTU Slave and provides the
following Modbus functions:
Read Coils
Write Single Coil
Read Holding Registers
Write Multiple Registers
Diagnosis
For the operation of the interface module and the understanding of this manual basic knowledge in
Modbus RTU communication is presupposed.
Parameter setting
Required parameter settings in MX350 / MX355 “Serial menu”:
UNIT NUMMER
Not valid for Modbus communication
(For setting of Modbus address see parameter “MODBUS”)
SERIAL BAUD RATE
This parameter defines the serial baud rate
0
9600
9600 baud
1
19200
19200 baud
2
38400
38400 baud
SERIAL FORMAT
This parameter defines the bit data format.
0
7-EVEN-1
Do not use with Modbus protocol
1
7-EVEN-2
2
7-ODD-1
3
7-ODD-2
4
7-NONE-1
5
7-NONE-2
6
8-EVEN-1
8 data bits Parity even 1 stop bit
7
8-ODD-1
8 data bits Parity odd 1 stop bit
8
8-NONE-1
Do not use with Modbus protocol
9
8-NONE-2
8 data bits no Parity 2 stop bits
