Siemens Sinumerik 840D sl Function Manual page 713

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27112
Parameter
Explanation
Response
Remedy
Program r
continuation
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Axis %1 CRC error of the safe actual value
%1 = axis name, spindle number
When checking the data consistency of the safe actual value (CRC), an
error was detected.
Possible causes for the alarm being 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.
-- Error in the encoder parameterization
-- Incorrect encoder evaluation type
-- Communication errors between the NCK and drive
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 (MD10094
$MA_SAFE_ALARM_SUPPRESS_LEVEL greater than or equal to 1).
Check the assignment of the drive via HW Config, MD36906
$MA_SAFE_CTRLOUT_MODULE_NR, MD10393
$MN_SAFE_DRIVE_LOGIC_ADDRESS and p0978 for correctness.
Check the encoder mounting
Check the encoder parameterization
Check NCK--MD (MD36916 $MA_SAFE_ENC_IS_LINEAR, MD36917
$MA_SAFE_ENC_GRID_POINT_DIST, MD36909
$MA_SAFE_ENC_RESOL) and the drive parameter field r0979
For DRIVE--CLiQ encoders: Check NCK--MD (MD36924
$MA_SAFE_ENC_NUM_BITS, MD36929 $MA_SAFE_ENC_CONF)
and drive parameter r047x.
For DRIVE--CLiQ linear encoders, also check NCK--MD MD36909
$MA_SAFE_ENC_MEAS_STEPS_RESOL and MD36913
$MA_SAFE_ENC_MEAS_STEPS_POS and drive parameter r0469 /
r0473.
Check whether the encoder evaluation was replaced (SMI, SMC, SME)
Check whether the encoder evaluation type was exchanged (SMx,
DRIVE--CLiQ encoder).
Check the encoder ID in MD$MA_SAFE_ENC_IDENT
Check and ensure that the EMC conditions are complied with.
Replace the hardware
Clear the alarm with the RESET key. Restart the part program.
10.2NCK safety alarms for Sinumerik 840D sl
Diagnostics
10-713