Intesis
TM
Modbus Server
– Mitsubishi Heavy Industries AC
User’s Manual r1.0 eng
© HMS Industrial Networks S.L.U - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
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Functional characteristics summary
General
Max. Number of
Mitsubishi Heavy
Industries interfaces
Two different versions of Intesis
TM
available, supporting a maximum
of 128 and 48 indoor units respectively.
Virtual signals
•
One communication error virtual signal per every single
Mitsubishi Heavy Industries AC
All these virtual signals are available from Modbus.
Modbus interface
Device type
Slave.
Modbus modes
supported
TCP, RTU EIA232 or EIA485.
Modbus TCP
configuration
parameters
•
IP address.
•
Subnet mask.
•
Default gateway address.
•
TCP port.
Modbus RTU
configuration
parameters
•
EIA232/EIA485.
•
Baud rate.
•
Parity.
•
Slave number.
Points
Configuration
AC system related fields.
•
Indoor unit main address: Main Address of the indoor each AC
indoor unit Modbus memory block relates to.
Supported Modbus
function codes
Read functions:
•
3- Read holding registers.
•
4- Read input registers.
Write functions:
•
6- Write single registers.
If poll records are used to read multiple records, the range of addresses requested
must contain valid addresses, otherwise the corresponding Modbus error code will be
responded.
Modbus data coding
All the point's values are coded in 2 byte registers (even if their
possible values are 0 and 1). They are expressed in MSB..LSB
format (Big Endian)
