Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 743)

L-force | PLC Designer
General Editors
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DMS 4.1 EN 03/2011 TD29 741
13.13.6 Qualifier
In order to configure in which way the actions should be associated to the IEC steps,
some qualifiers are available, which are to be inserted in the qualifier field of an action
element.
These qualifiers are handled by the SFCActionControl function block of the
IecSfc.library, which automatically is included in a project by the SFC plug-ins.
The available qualifiers:
N Non-stored The action is active as long as the step is active.
R overriding Reset The action gets deactivated.
S Set (Stored) The action will be started when the step becomes active and will be
continued after the step is deactivated, until the action gets reset.
L time Limited The action will be started when the step becomes active and it will
continue until the step goes inactive or a set time has passed.
D time Delayed A delay timer will be started when the step becomes active. If the step
is still active after the time delay, the action will start and continue until
it gets deactivated.
P Pulse The action will be started when the step becomes active/deactive and
will be executed once.
SD Stored and time Delayed The action will be started after the set time delay and it will continue
until it gets reset.
DS Delayed and Stored If the step is still active after the specified time delay, the action will
start and it will continue until it gets reset.
SL Stored and time limited The action will be started when the step becomes active and it will
continue for the specified time or until a reset.
The qualifiers L, D, SD, DS and SL need a time value in the TIME constant format.
Note: When an IEC action has been deactivated it will be executed once more. This
means that each action at least is executed twice.