Modbus Communication Protocols For Thermostat - Daitsu FSTD SLIM - EC FLEX Series Installation And Maintenance Manual

MODBUS Communication Protocols for Thermostat

Serial number
1
2
3
4
5
6
7
8
9
10
01 Read Coils:
Function Code
01
01
01
01
01
01
02 Read Discrete Inputs:
Function Code
02
02
Specification
Media
Baud Rate
Transmit Mode
Data Unit
Address
Function Code
DATA
CRC
Parity
0 Address
Outputs Register
Protocol Specification
Addresses
1
5
6
7
8
9
Discrete Inputs Register
Addresses
3
4
Protocol Specification
RS485
9600 BPS
Additional address + Function code + Data + CRC
1, 2, 3, 4, 6
0-255
CRC-16
Odd Parity
Broadcast Address
Valve 1
Fan speed- High
Fan speed- Med
Fan speed- low
Valve 2
Sleep mode
Protocol Specification
Internal sensor
External sensor
RTU
1-32
Data Define
"0" =OFF, "1"=ON
"0"=OFF,"1"=ON
"0"=OFF, "1"=ON
"0"=OFF, "1"=ON
"0"=OFF, "1"=ON
"0"=OFF, "1"=ON
Data Define
"0"=OK, "1"=FAULT
"0"=OK, "1"=FAULT
SK2019 FSTD-SLIM-EC-FLEX-001_01
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