Siemens SINUMERIK 840D Diagnostics Manual page 363
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10.04
Reactions:
Remedy:
Program Continuation:
25080
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
25100
Parameters:
Definitions:
Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA), 10.04 Edition
Drift compensation by hand: MD 36700 DRIFT_ENABLE=0
A static offset can be added to the speed setpoint in the machine data 36720
DRIFT_VALUE. This is not included in the drift monitoring because it acts like a voltage
zero offset.
- Alarm display.
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).
Clear alarm with the Delete key or NC START.
Axis %1 positioning monitoring
%1 = Axis name, spindle number
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 MD 36020
POSITIONING_TIME.
Exact stop coarse: MD 36000 STOP_LIMIT_COARSE
Exact stop fine: MD 36010 STOP_LIMIT_FINE
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY
(channel not ready).
- 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.
Please inform the authorized personnel/service department. Check whether the exact
stop limits (course and fine) correspond to the dynamic possibilities of the axis, otherwise
increase them, if necessary in connection with the positioning time set in MD 36020
POSITIONING_TIME. Check speed controller/position controller optimization; select
highest possible gains. Check setting of Kv factor (MD 32200 POSCTRL_GAIN) and
increase if necessary.
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 measuring system switchover not possible
%1 = Axis name, spindle number
The prerequisites are not satisfied for the required encoder switchover:
1. The newly selected encoder must be in the active state (DB 31 - 48, DBX 1.5 or 1.6 = 1
"Position measuring system 1/2")
2. The actual value difference between the two encoders is greater than the value in the
axis-specific MD 36500 ENC_CHANGE_TOL ("Maximum tolerance for position actual
value switchover").
Activation of the measuring system concerned takes place in accordance with the inter-
face signals: "Position measuring system 1" (DB 31 - 48, DBX 1.5) and "Position measur-
ing system 2" (DB 31 - 48, DBX 1.6), i.e. the position control is now operated with this
measuring system. The other measuring system is switched over to follow-up mode. If
both interface signals are set to "1", then only the 1st measuring system is active; if both
interface signals are set to "0", the axis is parked.
Changeover takes place as soon as the interface signals have changed, even if the axis is
in motion!
1 Alarms
1-363
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