Siemens sinumerik 840D sl Function Manual page 361

2.7.7 Logic gating functions: Source and reaction linking
The flexible logic operation possibilities of the static synchronized actions can be used to
trigger specific reactions based on sources. Linking ofall relevant sources with the aid of
static synchronous actionsis the responsibility of the user/machine manufacturer. They can
selectively evaluate the source system variables as a whole or by means of bit masks, and
then make a logic operation with their desired reactions. The static synchronous actions are
effective in all operating modes. A detailed description of how to use synchronous actions
can be found in:
References:
/FBSY/ Function Manual Synchronous Actions
/PGA/, Programming Manual Work Preparation (Synchronous Actions, System Variables)
Linking of axial sources with global or channel specific sources can be configured variably
with the aid of $AA_TYP (axis type).
2.7.8 Activating
Function enable
$AA_ESR_ENABLE
The functions generator operation, shutdown, retraction are released by setting the
corresponding control signal ($AA_ESR_ENABLE[Achse]). This control signal can be
modified by synchronized actions, by the part program and (indirectly) by the PLC.
Writing in $A_DBB allows the PLC to extensively influence the execution of the ESR
reactions, if appropriate access is also integrated into the synchronized actions. Thus the
PLC can indirectly influence the ESR response.
Triggering functions
$AN_ESR_TRIGGER (drive-independent)
• Generator operation "automatically" becomes active in the drive when the risk of DC link
• Drive-independent stop and/or retract are activated when communication failure is
• Drive-independent stop and/or retract can also be triggered by parts
Special functions: Axis Couplings and ESR (M3)
Function Manual, 11/2006, 6FC5397-2BP10-2BA0
undervoltage is detected.
detected (between NC and drive) as well as when DC link undervoltage is detected in the
drive (providing they are configured and enabled).
programs/synchronous actions by setting the system variable $AN_ESR_TRIGGER
(command to all drives). Prerequisite: Enable.
Detailed description
2.7 Extended stop and retract (ESR)
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