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4.2 Control Bit Setting
We can see from the Mapping Table that the basic control bit of indoor unit are: taking the first indoor unit as example, run
stop (40078), operation mode setting (40079), fan speed setting (40080), swing louver position setting (40081), temperature
setting (40082).
Example 1: explain with the first indoor unit communication protocol address, set turn on the unit, cooling, high fan, first
segment of swing louver, temperature is 19
℃
.
Modbus RTU:
32 10 9C 8E 00 05 0A 00 01 00 02 00 02 00 00 00 13 E1 BD
Modbus TCP:
00 01 00 00 00 11 FF 10 9C 8E 00 05 0A 00 01 00 02 00 02 00 00 00 13
Example 2: explain with the first indoor unit communication protocol address, set turn off the unit, heating, low fan,
second segment of swing louver, temperature is 30
℃
.
Modbus RTU:
32 10 9C 8E 00 05 0A 00 00 00 10 00 08 00 02 00 1E 26 28
Modbus TCP:
00 01 00 00 00 11 FF 10 9C 8E 00 05 0A 00 00 00 10 00 08 00 02 00 1E
4.3 Filter Clear Setting
Explain with the first indoor unit communication protocol address, when read the bit5 of communication protocol address
40003 equals to 1, it indicates that the filter of this indoor unit needs to be cleared, please clean the filter, then carry out filter
clear operation through Mapping Table.
For example: explain with the first indoor unit communication protocol address, operate 40083 address, refer to the
Mapping Table for others, as follows:
Modbus RTU: 32 10 9C 93 00 01 02 00 01 66 0B
Modbus TCP: 00 01 00 00 00 09 FF 10 9C 93 00 01 02 00 01
Note
●
In code sending stop, operation mode setting, fan speed setting, swing louver position setting, temperature setting, it
is recommended to use continuation write command 0x10 to complete all the setting as above, do not recommend to
send one single setting mode as a command.
For example:
Recommend “run stop”, “operation mode setting”, “fan speed setting”, “swing louver position setting”, “set
temperature” as one control command to be sent out.
Do not recommend: “run stop”, “operation mode setting”, “fan speed setting”, “swing louver position setting”,
“set temperature” as five control command to be sent out separately.
●
After sent one control command, need to wait for correct response code returned from the Modbus before sending
out next control command. If do not take this as your control method, please set the internal between two control
command to be more than 500ms.
Note
●
After sent one control command, need to wait for the correct response code returned by Modbus before sending out
next control command. If do not take this as your control method, please set the internal between two control
command to be more than 500ms.
4 Air Conditioner Monitoring