Siemens SINUMERIK 802D sl Specifikace stáhnout pdf (Strana 253)

NCK alarms/ISO alarms

06/2007 Overview of alarms

2-253

SINUMERIK 802D sl, Diagnostics Manual, 06/2007Edition

Remedy: Check tolerance value in MD 36400 CONTOUR_TOL, increase setting if necessary.

Check optimization of the position controller (servo gain factor in MD 32200 POSCTRL_GAIN) to

establish whether the axis follows the given setpoint without overshooting. Otherwise, the speed con-

troller optimization must be improved or the Kv servo gain factor must be reduced.

Check acceleration in MD 32300 MAX_AX_ACCEL. The position control is opened if the axis reaches

current limits as a result of excessive acceleration. The "lost" actual value is "caught up" in the form

of an overshoot once the control loop is closed again.

Improvement of speed controller optimization.

Check the mechanics (smooth running, inertial masses).

Program Con-

tinuation:

Teileprogramm neu starten.Clear alarm with the RESET key in all channels of this mode group.

Restart part program.

25060 Axis %1 speed setpoint limitation

Parameters: %1 = axis name, spindle number

Definitions: The speed setpoint has exceeded its upper limit for a longer period than allowed.

The maximum speed setpoint is limited to a certain percentage with the axis-specific machine data

36210 CTRLOUT_LIMIT. A setting of 100% corresponds to the rated speed of the motor and therefore

to rapid traverse velocity.

If the values are exceeded for a short time, then this is tolerated provided they do not last longer than

allowed for in the axis-specific MD 36220 CTRLOUT_LIMIT_TIME. During this period, the setpoint is

limited to the set maximum value (MD 36210 CTRLOUT_LIMIT).

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

prevail, then this alarm should not occur.

Check actual values: Local sluggishness of slide, speed dip and torque surge on workpiece/tool con-

tact, travel to fixed obstacle, etc.

Check direction of position control: Does the axis accelerate uncontrollably?

Check the speed setpoint cable.

Program Con-

tinuation:

Teileprogramm neu starten.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: Applies only to analog drives!

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

tion) has been exceeded during the last compensation operation! The permissible maximum value is

defined in the axis-specific MD 36710 DRIFT_LIMIT. The drift value itself is not limited.

Automatic drift compensation: MD 36700 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 compensated automatically to zero by slowly integrating

an internal drift value.

Drift compensation by hand: MD 36700 DRIFT_ENABLE = 0

A static offset can be added to the speed setpoint in MD 36720 DRIFT_VALUE. This is not included

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

Reaction: Alarm display.

Remedy: 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 bal-

ance out the dynamic drift changes (temperature rise effects).

Program Con-

tinuation:

Clear alarm with the Delete key or NC START.

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