Nc-Controlled Esr; Nc-Controlled Retraction (Polf, Polfa, Polfmask, Polfmlin) - Siemens SINUMERIK 840D sl Programming Manual

Work preparation
3.21 Extended stop and retract (ESR)
Activation
Function enable
The functions generator operation, shutdown, retraction are released by setting the
corresponding control signal $AA_ESR_ENABLE. This control signal can be changed by
synchronized actions.
Function triggering
ESR is triggered jointly for all enabled axes by setting the system variable
$AC_ESR_TRIGGER.
Generator operation is "automatically" activated in the drive when an imminent DC-link
undervoltage is detected.
Drive-independent stopping and/or retraction become active when a communication failure
(between the NC and drive) is detected and when a DC-link undervoltage is detected in the
drive (configuration and enable required).
Drive-independent stopping and/or retraction can also be triggered by the NC by setting the
appropriate control signal $AN_ESR_TRIGGER (broadcast command to all drives).
Further information
Function Manual Axes and Spindles
3.21.1

NC-controlled ESR

3.21.1.1

NC-controlled retraction (POLF, POLFA, POLFMASK, POLFMLIN)

Certain initial conditions are required for NC-controlled retraction (see "NC-controlled
retraction (POLF, POLFA, POLFMASK, POLFMLIN) (Page 976)"). When these requirements
have been satisfied, then the rapid lift (LIFTFAST) configured for retraction axis(axes) in the
channel is activated by setting the system variable $AC_ESR_TRIGGER (or
$AA_ESR_TRIGGER for single axes).
Syntax
POLF(<axis>)=<position>
POLFA(<axis>,<type>,<position>)
POLFMASK(<axis_1>,<axis_2>,...)
POLFMLIN(<axis_1>,<axis_2>,...)
The following abbreviated forms are permitted for POLFA:
POLFA(<axis>,<type>) ; Abbreviated form for single axis retraction
POLFA(axis,0/1/2) ; Quick deactivation or activation
POLFA(axis,0,$AA_POLFA[axis]) ; Causes a preprocessing stop
POLFA(axis,0) ; Does not cause a preprocessing stop
976
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming