Siemens SINUMERIK 840D Series Diagnostics Manual page 321

11.02
Reactions:
Remedy:
Program Continuation:
25021
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
25022
Parameters:
 Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
- The NC switches to follow-up mode.
- Mode group not ready.
- Channel not ready.
- NC Start disable in this channel.
- Axes of this channel must be re-referenced.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
- Channel not ready.
- If the axis is a single axis when this alarm is triggered, the alarm is only effective for this
axis (not effective for e.g. the channel or mode group)
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 used for position control. The actual value branch must there-
fore be checked:
1. Transmission path: Check the actual-value connector on the motor and on the FDD
module for correct contacting, encoder cable for continuity, and also check for short-cir-
cuits or grounding (loose contact?).
2. Encoder pulses: Encoder power supply within the tolerance limits?
3. Evaluation electronics: Replace or reconfigure the drive module used.
Monitoring can be switched off by setting machine data 36310
ENC_ZERO_MONITORING [n]=... N ... encoder number: 1, 2) is set to 0.
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 zero mark monitoring of passive encoder
%1 = Axis name, spindle number
Monitoring relates to the encoder that is not used by the position control! (Interface signal
DB 31 - 48, DBX 1.5 = 0 or 1.6 = 0)
The position encoder pulses between 2 zero marker pulses are counted (hardware func-
tion). A check is made in the interpolation cycle grid (standard setting 4 ms) as to whether
the encoder always issues the same number of pulses between the zero markers. As
soon as a difference is registered in the 4 counter bits of lowest significance, an alarm is
triggered!
- Alarm display.
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 used for position control. The actual value branch must there-
fore be checked:
1. Transmission path: Check the actual-value connector on the motor and on the FDD
module for correct contacting, encoder cable for continuity, and also check for short-cir-
cuits or grounding (loose contact?).
2. Encoder pulses: Encoder power supply within the tolerance limits?
3. Evaluation electronics: Replace or reconfigure the drive module used.
Monitoring can be switched off by setting machine data ENC_ZERO_MON_ACTIVE
[n]=... N ... encoder number: 1, 2) to 0.
Clear alarm with the Delete key or NC START.
Axis %1 encoder %2 warning %3
%1 = Axis name, spindle number
%2 = Encoder number
%3 = Error fine coding
1 Alarms
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