Axis %1 Measuring System Switchover Not Possible; Axis %1 Measuring Systems Differ Considerably; Axis %1 Selected Encoder Not Available - Siemens Sinamics S120 Diagnostic Manual

NCK alarms
25100

Axis %1 measuring system switchover not possible

Parameters: %1 = Axis name, spindle number
Definitions: The prerequisites are not satisfied for the required encoder switchover:
1. The newly selected encoder must be in the active state: (DB380x DBX0001.5 / 1.6 = 1 (Position measuring system
1/2).
2. The actual value difference between the two encoders is greater than the value in the axis-specific MD36500
$MA_ENC_CHANGE_TOL ("Maximum tolerance for position actual value switchover").
Activation of the measuring system concerned takes place in accordance with the NC/PLC interface signals DB380x
DBX0001.5 (Position measuring system 1) and DB380x DBX0001.6 (Position measuring system 2), i.e. the position
control is now operated with this measuring system. The other measuring system is switched over to follow-up mode.
If both interface signals are set to "1", then only the 1st measuring system is active; if both interface signals are set to
"0", the axis is parked.
Changeover takes place as soon as the interface signals have changed, even if the axis is in motion.
Reaction: NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Please inform the authorized personnel/service department. When referencing the active position actual value
encoder, the actual value system of the inactive encoder is set to the same reference point value as soon as phase 3
has been concluded. A later positional difference between the two actual value systems can have occurred only as
the result of an encoder defect or a mechanical displacement between the encoders.
- Check the encoder signals, actual value cable, connectors.
- Check the mechanical fastenings (displacement of the measuring head, mechanical twisting possible).
- Increase the axis-specific MD 36500 $MA_ENC_CHANGE_TOL.
Program continuation is not possible. The program must be aborted with "RESET", then program execution can be
reinitiated with NC START, if necessary at the interruption point after "Block search with/without calculation".
Program Clear alarm with the RESET key. Restart part program
Continuation:
25105

Axis %1 measuring systems differ considerably

Parameters: %1 = Axis name, spindle number
Definitions: The two measuring systems differ considerably, i.e. the cyclically monitored actual value difference between the two
measuring systems is greater than the associated tolerance value set in the machine data MD36510
$MA_ENC_DIFF_TOL. This can only occur when both measuring systems are active (MD30200 $MA_NUM_ENCS
= 2) and referenced. The alarm can be reprogrammed in the MD11412
$MN_ALARM_REACTION_CHAN_NOREADY (channel not ready).
Reaction: Mode group not ready.
The NC switches to follow-up mode.
Channel not ready.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Channel not ready.
Remedy: Please inform the authorized personnel/service department. Check machine data for the active, selected encoders.
Check the machine data relating to encoder (MD36510 $MA_ENC_DIFF_TOL) tolerance.
Program Teileprogramm neu starten.Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
25110

Axis %1 selected encoder not available

Parameters: %1 = Axis name, spindle number
Definitions: The selected encoder does not correspond to the maximum number of encoders in the axis-specific MD30200
$MA_NUM_ENCS, i.e. the 2nd encoder does not exist.
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Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
Alarms