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Connections
CoolMasterNet PRM Rev 0.7
12
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0 - Cool 1 - Heat 2 - Auto 3 - Dry
4 - Haux 5 - Fan 6 - HH
8 - VAM Auto 9 - VAM Bypass 10 - VAM Heat Exchange 11 - VAM Normal
Fan Speed Encoding
0 - Low 1 - Medium 2 - High 3 - Auto
4 - Top 5 - Very Low (quiet) 7 - VAM Super High
8 - VAM Low Fresh Up 9 - VAM High Fresh Up
Swing Encoding
0 - Vertical 1 - 30 deg 2 - 45 deg 3 - 60 deg
4 - Horizontal 5 - Auto 6 - OFF
There is a possibility to read/write holding registers of several indoors by one request. If the read request started
from one of the readable registers (not reserved) the values of reserved registers will be 0xFFFF in the
response. If the read request started from reserved register the response will be illegal data address. In a similar
way it works with the write request. If the write request started from one of the writable registers (not reserved)
the values that were intended for reserved registers will be ignored. If the write request started from one of the
reserved registers the response will be illegal data address.
4.6 GPIO
CoolMasterNet supports four GPIO marked as A B C D (see Layout ). GPIO can be in Input or Output mode
depending on it's functionality
Parameter GPIO A GPIO B GPIO C GPIO D
Input Low Voltage
(V
IL)
<1V <1V <1V ADC
Input High Voltage
(V
IH)
>2.4V >2.4V >2.4V ADC