Modbus Interface
CoolPlug PRM Rev 0.1
5
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© 2017 CoolAutomation
2.1 Modbus Register Map
Holding Register
Address*
Description
Read
Write
Required**
Notes
Hex
Dec
Version Type
CoolPlug Internals
0002
2
Reset
w
1 - Enter Boot Mode
2 - Reset CoolPlug
CoolPlug does not respond to the
write request into this register.
Configuration and Status
0020
32
HVAC Type index
r
Internal use
0021
33
Firmware Version
r
Major * 100 + Minor* 10 +
SubMinor
0022
34
Serial Number low word
r
0023
35
Serial Number high word
r
0024
36
Modbus Device address
w
Effective only after reset
0025
37
Master/Slave on HVAC line if another RC is
connected
r/w
0.0.4
0 - Slave
1 - Master
2 - Auto
0026
38
Indoor Centralized Address
r
Line/Indoor Status
0060
96
Line state (bit fields)
r
bit0:
0 - not connected to indoor,
1 - connected to indoor
bir1: - Reserved
bit2:
0 - no failure,
1 - indoor reports failure
bit3:
0 - normal operation,
1 - device in boot mode
bit4:
0 - line configured,
1 - line not configured
bits5..15: - Reserved
0061
97
Compact indoor status
r
bit0: 0 - on/off
bits: 1-5 - mode
see
mode encoding
bits 6-9: - fan speed
see
fan speed encoding
bits 10-12: - louver
see
louver position encoding
bit13: - filter sign
bit14: - therm on
0062
98
Set temperature
r/w
º
Celsius (x10)
0063
99
Ambient temperature
r
º
Celsius (x10)
0064
100
HVAC Failure code
r
0 - OK, else - HVAC failure code
0065
101
Own ambient temperature
r/w
º
Celsius (x10)
Line/Indoor Status (alternative)
0090
144
Line state (bit fields)
r
Same as 0x0060
0091
145
On/Off
r/w
0 - Off, other - On
0092
146
Mode
r/w
see
mode encoding
0093
147
Fan speed
r/w
see
fan speed encoding
0094
148
Swing
r/w
see
louver position encoding
0095
149
Filter sign
r/w
0 - no filter sign
1 - filter cleaning required
0096
150
Set temperature
r/w
º
Celsius (x10)
0097
151
Ambient temperature
r
º
Celsius (x10)
0098
152
HVAC Failure code
r
0 - OK, else - failure code
0099
153
Own ambient (feed) temperature
r/w
º
Celsius (x10)
