Siemens SINUMERIK 802S Diagnostics Manual page 70

1 Alarms
20 001
Explanation
Response
Remedy
Program continua-
tion by
20 002
Explanation
Response
Remedy
1-70
Channel %1 axis %2 cam signal missing
%1 = Channel number
%2 = Axis name, spindle number
At the beginning of phase 2 of reference-point approach, the signal from the
reducing cam is no longer available.
Phase 2 of reference-point approach starts when the axis stops on the reducing
cam after decelerating. Then the axis starts in the opposite direction to select
the next zero mark of the measuring system when leaving/re-approaching
(negative/positive edge) the reducing cam.
NC Stop at alarm.
NC Start inhibited.
Alarm display.
Interface signals are set.
Check whether the deceleration distance from the starting velocity is greater
than the reference cam - in this case, the axis can only stop behind the cam.
User longer cams.
When the axis has stopped on the cam, check whether the signal "DELAYED
REFERENCE-POINT APPROACH" (V380x1000.7) is still provided.
•
Hardware: wire break? short circuit?
•
Software: user program?
Press the RESET key to clear the alarm. Restart part program.
Channel %1 axis %2 zero reference mark not found
%1 = Channel number
%2 = Axis name, spindle number
The zero mark of the incremental position encoder is not within the defined
path.
The 2nd phase of reference-point approach ends when the zero mark of the
encoder has been detected after the rising/falling edge of the PLC interface
signal "DELAYED REFERENCE-POINT APPROACH" (V 380x1000.7) has
initiated trigger start. The maximum path distance between trigger start and the
zero mark following after the trigger start is defined in
MD 34 060 REFP_MAX_MARKER_DIST.
The monitoring prevents the zero mark signal from being overtraveled and the
next zero mark signal from being evaluated as a reference-point signal! (Faulty
cam adjustment or too high delay by PLC user program).
NC Stop at alarm.
NC Start inhibited.
Alarm display.
Interface signals are set.
Check cam adjustment and provide for sufficient distance between the end of
the cam and the zero mark signal following after the end of the cam. The dis-
tance must be longer than the distance which the axis can traverse within the
PLC cycle time.
6FC5598-3AA20-0BP2 © Siemens AG 2002 All Rights Reserved
SINUMERIK 802S/802C (DG)
01.02