Siemens Sinumerik 840D sl Diagnostic Manual page 97

03/2009
10720 [Channel %1: ] Block %3 axis %2 software limit switch %4
Parameters: %1 = Channel number
%2 = Axis name, spindle number
%3 = Block number, label
%4 = String (+ or -)
Definitions: The path programmed for the axis violates the currently valid software limit switch. The alarm is acti-
vated when preparing the part program block.
If bit 11=0 in the machine data MD11411 $MN_ENABLE_ALARM_MASK, this alarm is issued instead
of alarm 10722. If bit 11 is set in the machine data MD11411 $MN_ENABLE_ALARM_MASK, an
expanded diagnostics option is offered for the software limit switch violation. The condition for activa-
tion is the presence of the ALUN* alarm file in the HMI.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
Remedy: Check and correct positions in the NC program.
Please inform the authorized personnel/service department.
Check machine data: MD36100 $MA_POS_LIMIT_MINUS / MD36120 $MA_POS_LIMIT_MINUS2
and MD36110 $MA_POS_LIMIT_PLUS / MD36130 $MA_POS_LIMIT_PLUS2 for the software limit
switches.
Check the axis-specific interface signals: DB31, ... DBX12.3 / 12.2 (2nd software limit switch
plus/minus) to see whether the 2nd software limit switch is selected.
Check the currently active work offsets via the current frame.
Work offsets, overlaid movements ($AA_OFF), DRF and transformation components must also be
checked.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
10721 [Channel %1: ] Block %3 axis %2 software limit switch %4
Parameters: %1 = Channel number
%2 = Axis name, spindle number
%3 = Block number, label
%4 = String ( + or - )
Definitions: The motion planned for the axis violates the currently valid software limit switch.
The alarm is activated during the preprocessing of approach or rest blocks for REPOS.
Depending on MD11411 $MN_ENABLE_ALARM_MASK, bit11=0 this alarm is output instead of alarm
10723. If this MD11411 $MN_ENABLE_ALARM_MASK, bit11 is set in this machine data
$MN_ENABLE_ALARM_MASK, an expanded diagnostics option is offered for the software limit
switch violation. The condition for activation is the presence of the ALUN* alarm file in the HMI. See
also the Diagnostics Manual for alarm 10723.
Reaction: Local alarm reaction.
Interface signals are set.
Alarm display.
Remedy: Determine the cause of the offset from the initial or target position. The REPOS command is executed
at the end of an ASUB or system ASUB. See also cross reference from ASUBs.
Check the axis-specific NC/PLC interface signals DB31, ... DBX12.3 / 12.2 (2nd software limit switch
plus/minus) to see whether the 2nd software limit switch is selected.
Check the currently active work offset via the current frame.
Also check the external work offsets, overlaid movements ($AA_OFF), DRF and transformation com-
ponents.
Cancel the NC program with NC reset.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
10722 [Channel %1: ] Block %5 axis %2 software limit switch %6 violated,
residual distance: %7 %3<ALUN> violated
Parameters: %1 = Channel number
%2 = Axis name, spindle number
%3 = Unit of distance
%4 = Block number, label|number+string(+/-)|residual distance
© Siemens AG, 2009. All Rights Reserved
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
Overview of Alarms
NCK alarms
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