Siemens SINUMERIK 802S Diagnostics Manual page 81

01.02
Program continua-
tion by
25 030
Explanation
Response
Remedy
Program continua-
tion by
25 040
Explanation
© Siemens AG 2002 All Rights Reserved
SINUMERIK 802S/802C (DG)
1. Transmission path: Check the actual value connector on the
motor for correct contacting; check encoder cable for continuity, short circuit
and ground connection (loose contact?).
2. Encoder pulses: Encoder supply within tolerance limits?
3. Evaluation electronics: Change/reconfigure the drive module
used.
The monitoring can be switched off by setting MD 36 310
ENC_ZERO_MONITORING to "0".
Press the RESET key to clear the alarm. Restart part program.
Axis %1 actual velocity alarm
%1 = Axis name, spindle number
The actual speed of the axis is checked cyclically in IPO clock. If there is no
error, the actual speed can never be higher than defined in the axis-specific MD
36 200 AX_VELO_LIMIT (threshold value for speed monitoring). This
threshold value specified in [mm/min, rev/min] is entered by approx. 5 - 10 %
greater than it can occur with the maximum traversing speed. Drive errors
might result in exceeding the speed what causes the alarm.
Channel not ready for operation.
NC Start inhibited.
NC Stop at alarm.
The NC changes to follow-up mode.
Alarm display.
Interface signals are set.
Check speed setpoint cable (bus cable).
Check actual values and position-control direction.
Change position-control direction if the axis rotates uncontrolled → axis-
specific MD 32 110 ENC_FEEDBACK_POL = < -1, 0, 1 >.
Increase monitoring limit value in MD 36 200 AX_VELO_LIMIT.
Press the RESET key to clear the alarm. Restart part program.
Axis %1 standstill monitoring
%1 = Axis name, spindle number
The NC monitors holding of the position in standstill. The monitoring is started
after an axis-specific time set in MD 36 040 STANDSTILL_DELAY_TIME
after the interpolation has been completed. It is continuously checked whether
the axis remains within its tolerance threshold set in MD 36 030
STANDSTILL_POS_TOL.
The following cases are possible:
1. The interface signal SERVO ENABLE (V 380x0002.1) is zero, as the axis
is clamped mechanically. Mechanic influences (e.g. high forces due to ma-
chining) cause the axis to leave its permissible position tolerance.
2. With the position control circuit closed (without clamping) - interface
signal SERVO ENABLE (V 380x0002.1) IS "1" - high mechanical forces
with low gain in the open-loop position control circuit cause the axis to
leave its position.
6FC5598-3AA20-0BP2
1 Alarms
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