Remedy:
Please inform the authorized personnel/service department. The differences can result from transmission errors,
disturbances, encoder hardware faults or from the evaluation electronics in the encoder not used for position control. The
actual value branch must therefore be checked:
1. Transmission path: Check the actual-value connectors for correct contacting, encoder cable for continuity, and also
check for short-circuits and grounding (loose contact?).
2. Encoder pulses: Is the encoder power supply within the tolerance limits?
3. Evaluation electronics: Replace or reconfigure the drive or encoder module used.
4. Check MD34220 $MA_ENC_ABS_TURNS_MODULO and Sinamics drive parameter P0979 subindex 5 (or 15,25). Both
have to be the same for correct handling of the encoder data.
Monitoring can be switched off by setting MD36310 $MA_ENC_ZERO_MONITORING[n] to 0 or 100 (n = encoder number:
1, 2).
Programm
continuation:
Clear alarm with the Delete key or NC START.
25022
Axis %1 encoder %2 warning %3
Parameters:
%1 = Axis name, spindle number
%2 = Encoder number
%3 = Error fine coding
Explanation:
This alarm only occurs with absolute encoders:
a. Warning notice of missing absolute encoder adjustment (on the SIMODRIVE 611D or with PROFIdrive drives), that is
if MD34210 $MA_ENC_REFP_STATE equals 0. In this case, fine error code 0 is returned.
b. Only on the SIMODRIVE 611D if zero mark monitoring has been activated for the absolute encoder (see MD36310
$MA_ENC_ZERO_MONITORING): In this case, the absolute position of the absolute encoder could not be read without
error:
Breakdown of fine error codes:
(Bit 0 not used)
Bit 1 Parity error
Bit 2 Alarm bit of the encoder
Bit 3 CRC error
Bit 4 Timeout - start bit for EnDat transfer is missing
This alarm is only displayed, as the absolute position itself is not required at this time for control/contour.
A frequent occurrance of this alarm indicates that the absolute encoder transfer or the absolute encoder itself is faulty,
and that an incorrect absolute value could be determined in one of the next encoder selection or power on situations.
Reaction:
Alarm display.
Remedy:
a. Verify encoder adjustment (machine reference ) or readjust encoder.
b. Replace the encoder, replace or screen the encoder cable (or deactivate zero mark monitoring).
Programm
continuation:
Clear alarm with the Delete key or NC START.
25030
Axis %1 actual velocity alarm limit
Parameters:
%1 = Axis name, spindle number
Explanation:
If the axis has at least one active encoder, then the actual speed of the axis is cyclically checked in the IPO cycle. If there
are no errors, the actual velocity can never become greater than specified in the axis-specific MD36200
$MA_AX_VELO_LIMIT (threshold for velocity monitoring). This threshold value in [mm/min, rev/min] is input by an amount
that is about 5 to 10% greater than that which can occur at maximum traversing velocity. Drive errors can result in the
velocity being exceeded and the alarm is then triggered.
The alarm can be reprogrammed in the MD11412 $MN_ALARM_REACTION_CHAN_NOREADY (channel not ready).
SINUMERIK 808D ADVANCED alarms
5.2 NCK alarms
Diagnostics Manual
340
Diagnostics Manual, 06/2015, 6FC5398-6DP10-0BA2
