CoolAutomation CoolPlug Operating and maintenance manual

© 2017 CoolAutomation
CoolPlug PRM
Document Revision 0.1 10/3/2017
www.coolautomation.com
CoolPlug
Universal Interface Adapter
for HVAC Systems

2
Contents
CoolPlug PRM
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Table of Contents
1Document Revision History 3
2 Modbus Interface 4
........................................................................................................................................................................ 5
2.1 Modbus Register Map

Document Revision HistoryCoolPlug PRM Rev 0.1 3
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1 Document Revision History
·0.1 - Initial

Modbus InterfaceCoolPlug PRM Rev 0.1 4
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2 Modbus Interface
CoolPlug is fully compliant with following Modbus specifications:
·MODBUS over Serial Line Specification and Implementation Guide V1.02
·MODBUS application protocol specification V1.1b
CoolPlug supports Modbus RTU Transmission Mode. The default frame format for CoolPlug is:
Baud Rate
9600
Start Bits
1
Data Bits
8
Parity
No
Stop Bits
1
CoolPlug physical connection to Modbus is Two-Wire EIA/TIA-485 standard interface via 485-A and 485-B
terminals, recommended by Modbus specification. On such 2W-bus, at any time only one driver has the right for
transmitting thus a Modbus communication is always initiated by the master. CoolPlug will never transmit without
receiving a request from Modbus master.
A number of CoolPlug devices can be connected to single 2W-bus. Each CoolPlug in this case must have
unique Modbus slave address.
Supported Modbus Functions
Function Code
Function Description
03 (0x03)
Read Holding Registers
06 (0x06)
Write Single Register
16 (0x10)
Write Multiple registers
43 14 (0x2B 0x0E)
Read Device Information

Modbus InterfaceCoolPlug PRM Rev 0.1 5
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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
ºCelsius (x10)
0063
99
Ambient temperature
r
ºCelsius (x10)
0064
100
HVAC Failure code
r
0 - OK, else - HVAC failure code
0065
101
Own ambient temperature
r/w
ºCelsius (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
ºCelsius (x10)
0097
151
Ambient temperature
r
ºCelsius (x10)
0098
152
HVAC Failure code
r
0 - OK, else - failure code
0099
153
Own ambient (feed) temperature
r/w
ºCelsius (x10)

Modbus InterfaceCoolPlug PRM Rev 0.1 6
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* On the Modbus wire register addresses start from 0 and their values on wire are less by 1 then specified in table.
** If nothing specified, register is supported in any version and/or type. N.A. means future option
Mode Encoding
Cool
0
Heat
1
Auto
2
Dry
3
HAux
4
Fan
5
Fan Speed Encoding
Low
0
Medium
1
High
2
Auto
3
Top
4
Very Low
5
Louver (swing) position Encoding
Vertical
0
30º
1
45º
2
60º
3
Horizontal
4
Auto
5
Off
6
No
7