WindowActuator (FB)¶

FUNCTION_BLOCK WindowActuator

Window actuator.

Application example¶

Window actuators (chain type, jackscrew/spindle type) are widely used in building automation to open/close skylights, roof hatches and window elements to utilize natural ventilation.

Device examples¶

Kaiser Nienhaus Jaguar https://www.kaiser-nienhaus.de/fileadmin/content/produkte/antriebe/Produktdownloads/KN_-_450100___450150.pdf
Window Master WMS309 https://www.windowmaster.de/media/Files/Files/PDF/datablade/WMS_309_data_DE-1.pdf

Functionality¶

Lots of window actuators:

are controlled by two signals - open / close
do have a significant travel time
do need a pause inbetween direction change
shutoff drive power at final position (opened / closed) autonomously by final position switches
final position switches are most likely internal - thus they are not externally usable (in the control application)

Most often they are used as binary actuator simply opening / closing their related skylights / roof hatches / window elements.

WindowActuator implements a control algorithm for the aspects listed above except limited duty cycle. Transition from closed to open position (or vise versa) - the travel time - will not be interrupted by changing control signal to avoid de-syncronization. Also the pause time will not be interrupted by changing control signal.

Some application might want to used them as quasi-continuous actuators, thus involving position estimation and end position synchronization. This is beyond the scope of WindowActuator.

InOut:

Scope	Name	Type	Initial	Comment
Input	`xReqOpen`	`BOOL`	FALSE	Control signal - request to open the window/skylight/hatch
	`tTravel`	`TIME`	TIME#30s0ms	Travel time
	`tPause`	`TIME`	TIME#1s0ms	Pause inbetween direction change
	`xReset`	`BOOL`	FALSE	Reset
	`itfDateTimeProvider`	`Util.IDateTimeProvider`	Globals.g_dtpDateTimeProvider	Source for the current date and time information in milliseconds since 1.1.1970 00:00:00.000
Output	`xOpen`	`BOOL`		Open
	`xClose`	`BOOL`		Close
	`eState`	WindowActuatorState		Operational state
	`xError`	`BOOL`		Error indication
	`eErrorID`	Error		Error ID