Room cascade

Access 4.x

Control modes > Room cascade

Room temperature controller generates the setpoint for the supply air temperature controller.

Up to 4 room sensors can be connected. Room temperature is an averaged value, which is calculated according configured sensors.

Settings and configuration for Room cascade control
	Variable	Available options & Selection	Note
	Activate temperature control type
	Configuration > Functions > Function activation
	Temperature control type	\|...\| Room cascade \| … \|	-
	Activate sensors & additional options
	Configuration > Functions > Temperature control
	Room temperature sensor	\| No \| 1 \| 2 \| 3 \| 4 \|	-
	Calculation mode room temperature	\| Average \| Min value \| Max value \| Weighted average \|	* Option available if the number of room temperature sensors is more than 1. Weighted average - average of the min and the max values
	Supply air temperature sensor	\|Yes \| No \|	-
	Configure inputs
	Configuration > I/O allocation settings > Analog inputs >
	Room temperature 1		Any available I/O
	Supply air temperature
	PI Settings
	Configuration > PID controllers > Room
	P-band	[100] oC	PI settings for the room controller
	I-time	[300] s
	Operational settings
	Data & Settings > Temperature control > Supply air controller
	Supply air temperature	__ oC	Actual supply air temperature
	Min limit supply air	[12.0] oC	Limits of the supply air temperature. Temperature off these limits will trigger alarm AL-88 or AL89
	Max limit supply air	[30.0] oC
	Actual setpoint supply air	__ oC	Dictionary
	Data & Settings > Temperature control > Room controller
	Room temperature	__ oC	Actual room temperature
	Setpoint room	[21.0] oC	Setpoint
	Actual setpoint room	__ oC	Dictionary