Siemens SINUMERIK 802D sl Manual do Operador descarregar pdf (Página 180)

Overview of alarms 06/2009

NCK alarms

2-180

SINUMERIK 802D sl, Diagnostics Manual, 06/2009

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. This alarm should not occur if the drive

controller has been set correctly and the machining conditions are those that normally prevail.

- Check actual values: Local sluggishness of the carriage, speed dip by torque surge due to contact

with workpiece/tool, travel against fixed obstacle, etc.

- Check direction of position control: Does the axis continue to rotate without control?

Program Con-

tinuation:

Clear alarm with the RESET key in all channels of this mode group. Restart part program.

25070 Axis %1 drift value too large

Parameters: %1 = Axis name, spindle number

Definitions: Only with analog drives!

The permissible maximum value of drift (internal, integrated drift value of automatic drift compensa-

tion) was exceeded during the last compensation operation. The permissible maximum value is

defined in the axis-specific MD36710 $MA_DRIFT_LIMIT. The drift value itself is not limited.

Automatic drift compensation: MD36700 $MA_DRIFT_ENABLE=1

The difference between actual and setpoint position (drift) is checked cyclically in the IPO cycle when

the axes are at zero speed. The difference is automatically compensated to zero by slowly integrating

an internal drift value.

Drift compensation by hand: MD36700 $MA_DRIFT_ENABLE=0

A static offset can be added to the speed setpoint in the MD36720 $MA_DRIFT_VALUE. This is not

included in the drift monitoring because it acts like a voltage zero offset.

Reaction: Alarm display.

Remedy: Please inform the authorized personnel/service department. Adjust the drift compensation with the

automatic drift compensation switched off at the drive until the position lag is approximately zero. Then

reactivate the automatic drift compensation in order to balance out the dynamic drift changes (effects

of heating up).

Program Con-

tinuation:

Clear alarm with the Delete key or NC START.

25080 Axis %1 positioning monitoring

Parameters: %1 = Axis name, spindle number

Definitions: For blocks in which "exact stop" is effective, the axis must have reached the exact stop window after

the positioning time given in the axis-specific MD36020 $MA_POSITIONING_TIME.

Exact stop coarse: MD36000 $MA_STOP_LIMIT_COARSE

Exact stop fine: MD36010 $MA_STOP_LIMIT_FINE

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 whether the exact stop limits

(coarse and fine) correspond to the dynamic possibilities of the axis, otherwise increase them, if nec-

essary in connection with the positioning time set in MD36020 $MA_POSITIONING_TIME.

Check speed controller/position controller optimization; select highest possible gain.

Check setting of Kv factor (MD32200 $MA_POSCTRL_GAIN) and increase, if required.

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