Axis %1 Standstill Monitoring; Axis %1 Standstill Monitoring During Torque/Force Limitation - Siemens Sinamics S120 Diagnostic Manual

25040

Axis %1 standstill monitoring

Parameters: %1 = Axis name, spindle number
Definitions: The NC monitors to ensure that the position is held at zero speed. Monitoring is started after a time that can be set for
a specific axis in the MD36040 $MA_STANDSTILL_DELAY_TIME after interpolation has ended. A constant check is
made to determine whether the axis remains within the tolerance range given in MD36030
$MA_STANDSTILL_POS_TOL.
The following cases are possible:
1. The NC/PLC interface signal DB380x DBX0002.1 (Servo enable) is zero because the axis has jammed mechani-
cally. Due to mechanical influences (e.g. high machining pressure), the axis is pushed outside the permissible position
tolerance.
2. With closed position control loop (without jamming) - NC/PLC interface signal DB380x DBX0002.1 (Servo enable)
is "1" - the axis is pushed away from its position by mechanical forces with a small gain in the position control loop.
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 MD36040 $MA_STANDSTILL_DELAY_TIME and MD36030 $MA_STANDSTILL_POS_TOL; increase if nec-
essary. The value must be greater than the machine data "Exact stop - coarse" (MD36000
$MA_STOP_LIMIT_COARSE).
- Estimate machining forces and reduce if necessary by setting a lower feed or a higher rotational speed.
- Increase clamping pressure.
- Increase the gain in the position control loop by improved optimization (Kv factor MD32200 $MA_POSCTRL_GAIN,
SIMODRIVE611D drive).
Program Teileprogramm neu starten.Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
25042

Axis %1 standstill monitoring during torque/force limitation

Parameters: %1 = Axis name, spindle number
Definitions: The defined end position was not reached within the time specified in the machine data.
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: - If the drive torque (FXST) was set too low with the result that the force of the motor was not sufficient to reach the
end position -> increase FXST.
- If the machined part is slowly deformed, there may be a delay in reaching the end position -> increase MD36042
$MA_FOC_STANDSTILL_DELAY_TIME.
Program Teileprogramm neu starten.Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Continuation:
Alarms
Diagnostics Manual, 07/2010, 6FC5398-8BP40-0BA0
NCK alarms
349