Siemens SINUMERIK 840D Diagnostics Manual page 360

1 Alarms
Remedy:
Program Continuation:
25030
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
25031
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
25040
Parameters:
Definitions:
1-360
Replace the encoder, replace or screen the encoder cable (or deactivate zero mark mon-
itoring).
Clear alarm with the Delete key or NC START.
Axis %1 actual velocity alarm limit
%1 = Axis name, spindle number
If the axis has at least one active encoder, then the actual speed of the axis is cyclically
checked in the IPO cycle. If there are no errors, the actual velocity can never become
greater than specified in the axis-specific MD 36200 AX_VELO_LIMIT (threshold for
velocity monitoring). This threshold value in [mm/min, rev/min] is input by an amount that
is about 5 to 10% greater than that which can occur at maximum traversing velocity. Drive
errors can result in the velocity being exceeded and the alarm is then triggered.
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 the speed setpoint
cable (bus cable). Check the actual values and direction of position control. Change posi-
tion control direction if the axis rotates uncontrollably -> axis-specific MD 32110
ENC_FEEDBACK_POL [n] = < -1, 0, 1 >. Increase the monitoring limit value in MD 36200
AX_VELO_LIMIT.
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 actual velocity warning limit
%1 = Axis name, spindle number
The present velocity actual value is more than 80% of the limit value defined in the
machine data -- not used --
- Alarm display.
-
Clear alarm with the Delete key or NC START.
Axis %1 standstill monitoring
%1 = Axis name, spindle number
The NC monitors to ensure that the position is held at zero speed. Monitoring is started
after a time that can be set for a specific axis in the machine data 36040
STSTILL_DELAY_TIME after interpolation has ended. A constant check is made to deter-
mine whether the axis remains within the tolerance range given in MD 36030
STSTILL_POS_TOL.
The following cases are possible:
1. The interface signal SERVO ENABLE (DB31 - 48, DBX 2.1) is zero because the axis
has jammed mechanically. Due to mechanical influences (e.g. high machining pressure),
the axis is pushed away from the permissible position tolerance.
2. With closed position control loop (without jamming) - interface signal SERVO ENABLE
(DB 31 - 48, DBX 2.1) is "1" - the axis is pushed away from its position by mechanical
forces with a small gain in the position control loop.
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY
(channel not ready).
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA), 10.04 Edition
10.04