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Mitsubishi Heavy Industries VRF with KNX, Serial and IP support
6. Available Applications
6.1. Integration into Modbus Systems
6.1.1. Modbus Registers
NOTICE
This part is common for Modbus RTU and TCP.
Functions to read Modbus registers:
• 03 Read Holding Registers.
• 04 Read Input Registers.
Function to write Modbus registers
• 06 Single Multiple Holding Registers.
Modbus register contents are expressed in MSB .. LSB
The following tables list all available Modbus registers for the gateway.
NOTICE
Read/write parameter terminology:
• R: Read-only register.
• W: Write-only register.
• RW: Read and write register.
Table 1. Global registers
Modbus address
R/W
2995
R
Gateway Communication Status
2996
RW
On/Off (all the units)
2997
RW
Operation Mode (all the units)
2998
RW
Setpoint (all the units) (x10)
2999
RW
Fan Speed (all the units)
3000
RW
Remote Lock (all the units)
2
MSB: most significant bit; LSB: less significant bit
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Register name
0-No Error, 1-Failure
0-Off, 1-On
0-Cool, 1-Heat, 2-Fan, 3-Auto, 4-Dry
16 .. 30ºC / 60 .. 86ºF
0-Low, 1-Medium, 2-High, 3-Powerful
1-Lock, 0-Unlock
Possible values
Available Applications
USER MANUAL Version 1.2
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