Siemens SINUMERIK 840D sl Function Manual page 524
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Diagnostics
10.2 NCK safety alarms for SINUMERIK 840D sl
Remedy
Program
continuation
27113
Parameter
Explanation
Response
Remedy
Program
continuation
27124
Explanation
Response
Remedy
Program
continuation
10-524
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Check the encoder mounting
Check the encoder parameterization
Check the NCK_MD ($MA_SAFE_ENC_IS_LINEAR,
$MA_SAFE_ENC_GRID_POINT_DIST, $MA_SAFE_ENC_RESOL
and the drive parameter field r0979)
Check whether the encoder evaluation was replaced (SMI, SMC, SME)
Check the encoder ID in the MD $MA_SAFE_ENC_IDENT
Possible causes that the alarm is permanently present:
– The NCK monitoring channel for safety motion monitoring does not
communicate with the monitoring channel of the assigned drive, but
that of another axis. Check the assignment of the drive via HW Con-
fig, $MA_SAFE_CTRLOUT_MODULE_NR,
$MN_SAFE_DRIVE_LOGIC_ADDRESS and p0978 for correctness.
– Communication errors between the NCK and drive.
Replace the hardware
Check and ensure that the EMC conditions are complied with.
Clear the alarm with the RESET key. Restart the part program.
Axis %1 hardware encoder fault of the safety–related actual value
%1 = axis number
The encoder evaluation signals a hardware fault. Causes could be dirt
in the optical encoder evaluation or problems associated with the signal
transfer.
Alarm display
In addition, a STOP F is initiated, that can result in the subsequent
Alarm 27001 with fault IDs 0, 27023 and 27024. Alarm 27001 with fault
ID 0 can be prevented using the alarm reduction
($MA_SAFE_ALARM_SUPPRESS_LEVEL greater than or equal to 1).
Replace the encoder hardware
Check and ensure that the EMC conditions are complied with.
Clear the alarm with the RESET key. Restart the part program.
Stop A initiated for at least one axis
This alarm only indicates that Stop A has been initiated in at least one
axis and power on is required to acknowledge the alarm. The alarm is
output if the alarm priority function was activated in MD
$MN_SAFE_ALARM_SUPPRESS_LEVEL.
Alarm display
Interface signals are set
"Pulse cancellation" is initiated for the axis involved.
Locate the cause of the error by evaluating additional alarm messages
Power–down the control and power–up again
© Siemens AG 2008 All Rights Reserved
05.08
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