Siemens SINUMERIK 840C Installation Instructions Manual page 537

7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
1420
Default value
30.0
Input of maximum motor speed for set-up mode. During set-up, the absolute speed setpoint
value is limited to the value specified above. If the speed setpoint is limited to the value set in
MD 1420, a message is also output.
1421
Default value
0.0
The speed controller loop integrator is reduced via a weighted feedback to a low-pass
response of the 1st order with the configured time constant.
Effect:
The speed controller integrator output is limited to a value which is proportional to the setpoint-
actual value difference (steady-state proportional operating characteristic).
Applications:
• Machining motions with zero position setpoint and dominant static friction can be
suppressed (at the cost of a permanent position setpoint/actual value difference).
• Prevention of strain on rigidly coupled axes or spindles (synchronous spindle).
• Prevention of overshooting during positioning.
Note:
The integrator feedback is activated when MD 1421 is set to 1.0.
1424
Default value
0.0
Input of time constant of the 1st-order balancing filter in the speed feedforward control channel
of the speed/torque feedforward control. The setpoint response of the closed current conrol
loop can be adjusted by entering an appropriate time value in MD 1424, resulting in
symmetrization of the higher-level speed control loop. Allowance is automatically made for the
time constants of the active current setpoint filters (low-pass filters only) when the balancing
filter is initialized.
Note:
When the value 0 is entered, the filter is only deactivated (proportional element with gain factor
1) if no low passes are currently active as the current setpoint filter.
7–122
More user manuals on
Maximum motor speed set-up mode
Lower input limit
0.0
Time constant integrator feedback
Lower input limit
0.0
Symmetr. speed feedfwd ctrl channel
Lower input limit
0.0
ManualsBase.com
Upper input limit
50 000.0
Upper input limit
1 000.0
Upper input limit
50 000.0
©
Siemens AG 1992 All Rights Reserved
04.96
Active
at once
Units
rev/min
Active
at once
Units
ms
Active
at once
Units
µs
6FC5197- AA50
SINUMERIK 840C (IA)