General Protocol Definitions
CoolMaster PRM
7
www.coolautomation.com
© 2015 Cool Automation LTD
Rev 4.08
3
General Protocol Definitions
3.1
Message format
Communication between PC or Home Automation Controller and CoolMaster via RS232 interface is
based on text messages. Communication example is shown below
>
stat 101
command
PC to CoolMaster
101 ON 27C 00,00C Auto Dry OK
response
CoolMaster to PC
O K
exit code
>
prompt
Command message sent to CoolMaster must be terminated by CR (carriage return 0x0D) LF (line feed
0x0A) sequence or a single CR character. Messages from CoolMaster (except prompt character) are
terminated by CR LF. Commands are case sensitive and should not contain leading or trailing spaces.
The only separator between command name and command parameter(s) is space character.
In case of wrong command CoolMaster response can be one of the following strings:
Unknown command
Unrecognized command name
Bad parameters
Command has missing or wrong parameters
If command was executed CoolMaster will return optional response and exit code. Detailed information
is provided in topics describing specific commands.
3.2
Indoor Unit Addressing
To address specific indoor unit the UID parameter is used in CoolMaster commands. UID format is
three characters. First character is hexadecimal digit in range 0-9 or A-F to represent system numbers
0-9, 10-15 correspondingly or Z to specify centralized address mode.
UID Format:
1
2
3
System Number Unit Number in System
0-9, A-F
00-99 or FF
·
For CoolMaster 4000M System Number must be 0, Unit Number must be 01-50
·
For CoolMaster 1000D System Number must be in range 1-4
·
For CoolMaster 2000S, 3000T, 7000F,8000I(MH), 9000H System Number should not be 0
·
For CoolMAster 6000L System Number must be 0, Unit Number must be 00-FF
·
For CoolMaster G Unit Number must be in range 01-16
UID reflects the indoor unit address. For proper operation of CoolMaster all indoor units have to be
given addresses (depending on specific AC system type this can be done automatically by system or
has to be done manually by integrator). You should refer to specific AC system manuals to find out how
to set and quire indoor unit addresses.
Below are examples of accepted UID's.
UID
Indoor Address
100
1-00
