Siemens SINUMERIK 802D sl Manuel de l'opérateur télécharger pdf (Page 156)

Overview of alarms 06/2009

NCK alarms

2-156

SINUMERIK 802D sl, Diagnostics Manual, 06/2009

Program Con-

tinuation:

Clear alarm with the RESET key. Restart part program

20002 [Channel %1: ] Axis %2 zero mark not found

Parameters: %1 = Channel number

%2 = Axis name, spindle number

Definitions: The hardware zero mark of the incremental position encoder or the substitute zero mark of the abso-

lute position encoder is not within a defined section.

Phase 2 of the reference point approach ends when the zero mark of the encoder has been detected

after the rising/falling edge of the NC/PLC interface signal V380x1000.7 (Deceleration reference point

approach) has given the trigger start. The maximum distance between the trigger start and the zero

mark that follows is defined in the MD34060 $MA_REFP_MAX_MARKER_DIST.

The monitor prevents a zero mark signal from being overtraveled and the next being evaluated as ref-

erence point signal. (Faulty cam adjustment or excessive delay by the PLC user program).

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.

Check the cam adjustment and make sure that the distance is sufficient between the end of the cam

and the zero marker signal that follows. The path must be greater than the axis can cover in the PLC

cycle time.

Increase the MD34060 $MA_REFP_MAX_MARKER_DIST, but do not select a value greater than the

distance between the 2 zero markers. This might result in the monitor being switched off.

Program Con-

tinuation:

Clear alarm with the RESET key. Restart part program

20003 [Channel %1: ] Axis %2 measuring system error

Parameters: %1 = Channel number

%2 = Axis name, spindle number

Definitions: In a measuring system with distance-coded reference marks, the distance between two adjacent

markers has been found to be more than twice the value entered in MD34300

$MA_ENC_REFP_MARKER_DIST. The control does not issue the alarm until it has again detected

a distance that is too long after having made a 2nd attempt in reverse direction with half the traversing

velocity.

Reaction: NC Start disable in this channel.

Interface signals are set.

Alarm display.

NC Stop on alarm.

Remedy: Determine the distance between 2 odd reference marks (reference mark interval). This value (which

is 20.00 mm on Heidenhain scales) must be entered in MD34060 $MA_REFP_MAX_MARKER_DIST.

Check the reference track of the scale including the electronics for the evaluation.

Program Con-

tinuation:

Clear alarm with the RESET key. Restart part program

20004 [Channel %1: ] Axis %2 reference mark missing

Parameters: %1 = Channel number

%2 = Axis name, spindle number

Definitions: In the distance-coded length measurement system, 2 reference marks were not found within the

defined searching distance (axis-specific MD34060 $MA_REFP_MAX_MARKER_DIST).

A reduction cam is not required for distance-coded scales (but an existing cam will be evaluated). The

conventional direction key determines the direction of search.

The searching distance MD34060 $MA_REFP_MAX_MARKER_DIST, within which the two reference

marks are expected is counted commencing at the start point.

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.

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Siemens SINUMERIK 802D sl Manuel de l'opérateur Page 156

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