Question:
For MRV-7S outdoor units, connect XY port with 12.5-inch central controller directly without gateways, then read ODU modbus exchange table from COM5 port of controller, why the "indoor unit set temperature "(function code 03, address 0)cannot be read and written?
Answer:
When we using central controller, in the old modbus exchange table of outdoor unit, unit of set temp. is 1℃, but for our new batch VRF production, unit of set temp. is 0.5℃. So we added a new address to set IDU temp.: function code 03, address 40515.The “Set Temp.” Modbus addresses are 40515 for IDU1, 40521 for IDU2 and so on, up to 40893 for IDU64, spaced at regular intervals.
