MODBUS
The modbus in reading is always enabled.
It is possible to read 1 register at a time.
To enable it for writing:
set register 138 to 1, or
set on the controller
Project Menu
→
Controller select
→
Modbus = Yes
Communication spec: RS-485
Protocol :ModbusRTU
：
9600,8,N,1
Baud rate : 9600bps
Data bits:
8 Data bits
Parity bit
：
None Parity
Stop bit: 1 stop bit
Connections
Connect on the back of the controller.
Modular unit: connect the modbus to the MASTER unit port .
Unit address
The default address is 1.
It can be modified on the controller:
Project Menu
→
Controller select
→
Modbus address
-
H1
+
H2
03
reading
06
single register writing
16
multiple register writing
Function code
Reading register, writing a single register, multiple register writing
Address
function
note
0
Modo
(1 Cooling
,
8 Off)
1
Temperature Setpoint
COOL (5
℃
~ 20
℃
)
2
Temperature Setpoint B
COOL( 5
℃
~ 20
℃
)
Reading and writing register
Address
function
note
101
Double setpoint
Enable/Disable 1/0
102
1o setpoint in cooling
5~20°C
103
2o setpoint in cooling
5~20°C
106
temperature compensation in cooling
Enable/Disable
107
point 1 temperature compensation in cooling
25~30°C
108
point 2 temperature compensation in cooling
35~40°C
109
temperature compensation value in cooling
0~15°C
138
Modbus writing enable
disable local control from controller
1 = enabled; 0 = disabled
Addresses 0 - 15 are the addresses of the selected units.
(addresses)*100+240—(addresses)*100+299 , are read only.
