Siemens SINUMERIK 840D Diagnostics Manual page 626

1 Alarms
310610
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
310611
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
1-626
Axis %1 drive %2 wrong piston position
%1 = NC axis number
%2 = Drive number
The error is triggered if the actual position of the drive is negative.
Cause:
• Incorrect counting direction of actual position on drive side.
• Incorrect piston zero alignment.
• If the drive is referenced and the offset between the piston zero (piston stop at A side)
and the machine zero is entered in MD 5040, the piston position in MD 5741 can only indi-
cate positive values (from zero to piston stroke length).
- 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.
The counting direction for the actual position is correct on the drive side if:
1. Pos. setpoint voltage (e.g. function generator) -> cylinder piston travels from A to B. If
not: Invert the actuation signal (change MD 5476 bit 0).
2. Cylinder piston travels from A to B -> v_act (MD 5707) > 0. If not: Invert the actual value
(change MD 5011 bit 0).
Check the piston zero alignment and correct if necessary:
Set MD 5012 bit 14 and bit 15 to zero, save bootfile, reset NCK, perform a reference point
approach and then align the position.
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 drive %2 pressure sensor failed
%1 = NC axis number
%2 = Drive number
Power limitation or friction compensation is activated: Modify MD 5241: bit 0 or bit 1 is set
and both actual pressure values are less than 2% of the system pressure in MD 5101:
WORKING_PRESSURE on performance enable.
Cause: Pressure sensor or connecting cable defective.
- 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.
Check the connection of both pressure sensors.
If no pressure sensors are installed:
• Deactivate the force limitation: Modify MD 5241: reset bit 0
• Deactivate friction compensation: Modify MD 5241: reset bit 1
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA), 10.04 Edition
10.04