Available Applications; Integration Into Modbus Systems; Modbus Registers - HMS Networks Intesis IN776MHI00 O000 Series User Manual

Mitsubishi Heavy Industries VRF with KNX, Serial and IP support

6. Available Applications

NOTE
Signals marked as Optional signals are supported by the gateway but may not be supported by the
server devices of the installation. Please refer to the technical documentation of each server device
to know which signals they support.

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 Holding Registers.
Modbus register contents are expressed in most significant bit (MSB) .. less significant bit (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.
• T: Trigger-only register
Table 2. Global registers
Register name
Gateway Communication Status
On/Off (all the units)
Operation Mode (all the units)
Setpoint (all the units) (x10)
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Possible values Modbus address
0: No Error
1: Failure
0: Off
1: On
0: Cool
1: Heat
2: Fan
3: Auto
4: Dry
Celsius: 16 .. 30°C
Fahrenheit: 60 .. 86°F
R/W
2995 R
2996 R, W
2997 R, W
2998 R, W
Available Applications
USER MANUAL Version 1.2.7