Siemens SINUMERIK 840D Series Diagnostics Manual page 549

11.02
Remedy:
Program Continuation:
310610
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
310611
Parameters:
Definitions:
 Siemens AG, 2002. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
• The wrong encoder may be in use.
• Does the number of encoder lines match the setting in MD 5005:
ENC_RESOL_MOTOR (encoder resolution for motor measuring system)?
• Is the encoder cable connected correctly?
• Is the encoder cable shield installed flat?
• Replace the encoder.
• Replace the 611D hydraulic module.
• Modify MD 5605: SPEEDCTRL_LIMIT_TIME and MD 5606:
SPEEDCTRL_LIMIT_THRESHOLD in accordance with the mechanical and dynamic
features of the axis.
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
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
indicate positive values (from zero to piston stroke length).
- Mode group not ready.
- Channel not ready.
- Channel not ready.
- NC Start disable in this channel.
- NC Stop on alarm.
- The NC switches to follow-up mode.
- Alarm display.
- Interface signals are set.
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.
1 Alarms
1-549