Siemens SINUMERIK 840Di sl Function Manual page 15

Note
The following actions are operative only in AUTOMATIC mode when the program is running:
STOPREOF
DELDTG
Frequency
Keywords (see table) are programmed to indicate how often the subsequently specified
condition must be scanned and the associated action executed if the condition is fulfilled.
These keywords are an integral component of the synchronized action condition.
Table 2-1 Effect of frequency keywords
Keyword Scanning frequency
None If no scanning frequency is programmed, then the action is executed cyclically in every interpolation
cycle.
WHENEVER The associated action/technology cycle is executed cyclically in every interpolation cycle provided that
the condition is fulfilled.
FROM If the condition has been fulfilled once, the action/technology cycle is executed cyclically in every
interpolation cycle for as long as the synchronized action remains active.
WHEN As soon as the condition has been fulfilled, the action/technology cycle is executed once. Once the
action has been executed a single time, the condition is no longer checked.
EVERY The action/technology cycle is activated once if the condition is fulfilled. The action/technology cycle is
executed every time the condition changes from the FALSE to the TRUE state.
In contrast to keyword WHEN, checking of the condition continues after execution of the action/cycle
until the synchronized action is deleted or disabled.
Details of technology cycles are given in the Chapter "Call of technology cycles".
Deleting with CANCEL
If an active synchronized action is cancelled (deleted) with CANCELfrom the part program,
then the active action is not affected. Positioning motions are completed as programmed.
With the command CANCEL a modal or a statically active synchronized action can be
deleted.
If a synchronized action is deleted while the positioning axis motion it has initiated is still in
progress, the positioning motion continues until properly executed. A channel stop also
cancels the positioning movement from synchronized actions/technology cycles.
G code for condition and action
Starting from SW-version 5 the G-codes can be programmed in synchronized actions. This
allows defined settings to exist for the evaluation of the condition and the action/technology
cycle to be executed, independent of the current parts program status. It is necessary to
separate the synchronized actions from the program environment, because synchronized
actions are required to execute their actions at any time from a defined initial state as a
result of fulfilled trigger conditions.
Synchronized actions
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
Detailed description
2.1 Components of synchronized actions
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