Cascade Control - Mitsubishi Electric AHU-KIT-SP Manual

8. Cascade control

●Multiple refrigerant system
・By connecting the AHU interface with the X7 connector, up to 16 units can be connected.
・The interface address of master is fixed to 0. Slave address can be set from 1 to F.
・Connect one outdoor unit per AHU interface.
・Run/stop, operation mode, and thermo ON/OFF are all judged by master.
・Slave only receives commands from master.
・In cascade control, rotation control and fault backup control are automatically enabled.
●Capacity distribution of cascade control
・The master commands the capacity to each slave.
・The image is shown below.
The master commands each slave.
100
X1 X2
25
0 25 100 125
Required capacity of the system X_all[%]
The master calculates X_all from the following:
・Analog input or Modbus or remote control
(0–10V/4-20mA, 0–100%, set temperature)
・Number of outdoor units
Each slave operates according to the master command.
X3
200 225
MODEL NAME
Air Handling Unit Interface
MODEL TYPE
AHU-KIT-SP
ISSUE CLASSIFICATION
SPECIFICATION
MORIKAWA
DWG NO.
REV.MARK PAGE
PSZ000Z308
21.09.17
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