OPERATOR'S MANUAL
Gateway
Version: 27143
Subject to technical changes
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
15
6.6
Controlling the frequency inverter FU via Modbus
M12 socket
PIN no.
Assignment
1
24V
2
RS 485 - A
3
GND
4
RS 485 - B
Housing
Shield
Figure 8
MODBUS RTU - Wiring
Master
Gateway
Slave 1
FU 1
Adr.001
Slave 2
FU 2
Adr.002
Slave 3
FU 3
Adr.003
Slave 4
FU 4
Adr.004
Modbus A/+
RS485 A/+
RS485 A/+
RS485 A/+
RS485 A/+
Modbus B/-
RS485 B/-
RS485 B/-
RS485 B/-
RS485 B/-
Connection cable with M12 connector A-coded, available with 10m length and open cable
end.
For pure Modbus operation, the following FU parameters must be set:
Kostal INVEOR setting parameters
6.051
SAS / MODBUS baud rate
9600
6.065
MODBUS configuration
4 = 8 bits, even parity, 1 stop bit, 32 bit,
big endian
6.050
MODBUS bus address
Values 1 – 4 (factory setting 1)
6.064
RS485 bus type
1: Modbus RTU / SPF
1.130
Setpoint source
4: SAS/MODBUS
1.131
SW enable
9: Autostart