MCD Modbus Module Instructions
Appendix A - Modbus Control via Remote Operator
MG.17.F5.02 - VLT
® is a registered Danfoss trademark
13
11.6.
Using the Remote Operator with MCD 500
In order for the MCD 500 to accept commands from the serial network, the soft starter must be in
Auto On mode and links must be fitted to terminals 17 and 25 to 18.
The Modbus Module must be used as an interface between the soft starter and the Remote Operator.
The DIP switches on the Modbus Module must be set as follows:
1
Protocol = AP ASCII
2
Address = 20
3
Baud Rate = 9600
4
Parity = No parity
5
Timeout = No timeout
123456
ON
123456
ON
+16
+8
+4
+2
+1
0
0
0
0
0
DIP S
W
ITCH A
DIP S
W
ITCH B
177HA543.10
1
2
3
4
5
The Remote Operator internal parameters must be set as follows:
Parameter 1 (RS485 network baud rate) = set to match Modbus master
Parameter 2 (RS485 network address) = unique number between 1 ~ 99
Parameter 3 (RS485 network timeout) = set as required
Parameter 4 (RS485 network protocol) = Modbus RTU
Parameter 5 (Modbus protocol parity) = set to match Modbus master
+
-
177HA535.
10
MCD 500
(Auto On mode)
REMOTE OPERATOR
RS485
Serial Port
B8 B7 B6
B1
B2
B3
B6 B7 B8
RS485
RS485
4-20 mA
Analog Output
B10 B11
4-20 mA
Supply Voltage
18~30 VAC/VDC
1
2
PO
GND
RS485 SERIAL COMMS
NETWORK CONNECTION
(MODBUS RTU)
+ GND -
- GND +
- GND +
+ -
~/+ ~/-
MODBUS MODULE
17
18
25
Stop
COM
Reset