Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 67)

L-force | PLC Designer
What is What in PLC Designer
DMS 3.2 EN 02/2011 TD29 65
Whether a newly inserted step is an IEC step depends upon whether the menu
command 'Extras' 'Use IEC-Steps' has been chosen.
In the Object Organizer the actions hang directly underneath their respective SFC
POUs. New actions can be created with 'Project' 'Add Action'.
In order to use IEC steps you must include in your project the special SFC library
Iecsfc.lib .
SFC POU with actions in the Object Organizer
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”).