12 MODBUS
Communication specifications: 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.
Enabling
Press Menu +
for 3 sec
or
SERVICE MENU > SETTING ADDRESS > Modbus enable > YES
01
query
03
reading
06
single register writing
16
multiple register writing
Function codes
- H1
+ H2
Address
function
notes
0
Mode
1 Cooling
,
8 Off
1
Temperature setpoint
from -8℃ (or Tsafe*) to 20℃
2
Temperature setpoint B
from -8℃ (or Tsafe*) to 20℃
Reading register, writing a single register, multiple register writing
*Tsafe > pag43