Possible Trigger Sources - Siemens sinumerik 840d Programming Manual

12.98
13
840D 840D
NCU 571 NCU 572
NCU 573
Retract (drive-independent)
Drive-independent retract is
• configured: via MD; time specification and return
velocity are set in MD, see "Example: Using the
drive-independent reaction" at the end of this
chapter,
• enabled: system variable $AA_ESR_ENABLE
• triggered: system variable $AN_ESR_TRIGGER.

13.5.2 Possible trigger sources

Function
The following error sources for starting "Extended
stop and retract" are possible:
• General sources (NC-external/global or mode
group/channel-specific):
• Digtial inputs (e.g. on NCU modules or
terminal blocks) or mapping the digital
outputs within the control ($A_IN, $A_OUT)
• Channel status ($AC_STAT)
• VDI signals ($A_DBB)
• Group messages from a number of
alarms ($AC_ALARM_STAT)
• Axial sources:
• Emergency retraction threshold of the
following axis (synchronization of
electronic coupling,
$VA_EG_SYNCDIFF[following axis])
• Drive: DC link warning threshold (pending
undervoltage), $AA_ESR_STAT[axis]
• Drive: Generator minimum velocity
threshold (no more regenerative rotation
energy available), $AA_ESR_STAT[axis].
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
13.5 Extended stopping and retract (as of SW 5)
FM-NC 810D 840Di
Additional Functions
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