RCF manual Chapter 8 Control principles 27
Control mode Min limitation Max limitation
Heating 24°C 35°C
A room controller will then work together with a supply air temperature controller using
cascade control, resulting in a calculated supply air temperature maintaining the room
temperature setpoint.
The cascade factor consists of the supply air controller being faster than the room controller.
The cascade factor in RCF acts as a divisor which affects both the P-band and I-time.
Example: If the cascade factor is 3 and the room controller has a P-band of 10°C and an I-
time of 300 s, the supply air controller will receive a P-band of 3°C and an I-time of 100 s.
The supply air controller will therefore be 3 times as fast as the room controller.
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