Siemens SINUMERIK 840D sl Series Diagnostics Manual page 914

Overview of Alarms
- Alarm display.
- NC Stop on alarm.
Remedy: Check and, if necessary, correct MD 5011: ACTUAL_VALUE_CONFIG (actual value
sensing configuration).
Program Con- Switch control OFF - ON.
tinuation:
310750
Axis %1 drive %2 feedforward gain too high
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The feedforward control gain is calculated from the reciprocal of the gain in drive MD
5435: CONTROLLED_SYSTEM_GAIN.
Reactions: - NC 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.
Remedy: Increase the speed controller cycle time in MD 5001: SPEEDCTRL_CYCLE_TIME.
Reduce the force controller feedforward factor in MD 5247: FORCE_FFW_WEIGHT.
Increase the gain in MD 5435: CONTROLED_SYSTEM_GAIN.
Program Con- Clear alarm with the RESET key in all channels. Restart part program.
tinuation:
310751
Axis %1 drive %2 proportional gain for speed controller too high
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The P gain of the speed controller is too high:
• Modify MD 5406: SPEEDCTRL_GAIN_A (gain on A-side of cylinder edge)
• or MD 5407: SPEEDCTRL_GAIN (gain for piston adjustment with lowest natural fre-
quency)
• or MD 5408: SPEEDCTRL_GAIN_B (gain on B-side of cylinder edge)
Reactions: - NC 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.
Remedy: Enter a smaller value for the P gain of the speed controller:
• Modify MD 5406: SPEEDCTRL_GAIN_A (gain on A-side of cylinder edge)
• or MD 5407: SPEEDCTRL_GAIN (gain for piston adjustment with lowest natural fre-
quency)
• or MD 5408: SPEEDCTRL_GAIN_B (gain on B-side of cylinder edge)
Program Con- Clear alarm with the RESET key in all channels. Restart part program.
tinuation:
2-914
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005