Qualifier

In order to associate the actions with IEC steps the following qualifiers are available:

N	Non-stored	The action is active as long as the step
R	overriding Reset	The action is deactivated
S	Set (Stored)	The action is activated and remains active until a Reset
L	time Limited	The action is activated for a certain time, maximum as long as the step is active
D	time Delayed	The action becomes active after a certain time if the step is still active and then it remains active as long as the step is active.
P	Pulse	The action is executed just one time if the step is active
SD	Stored and time Delayed	The action is activated after a certain time and remains active until a Reset
DS	Delayed and Stored	The action is activated after a certain time as long as the step is still active and remains active up to a Reset
SL	Stored and time limited	The action is activated for a certain time

The qualifiers L, D, SD, DS and SL need a time value in the TIME constant format. This value can be entered directly (e.g. “T#5s”) or by a variable of datatype TIME (e.g. “t_var”).

Note

When an action has been deactivated it will be executed once more. This means that each action at least is executed twice (also an action with qualifier P).