Siemens SINUMERIK 840C Installation Instructions Manual page 483

7 Drive Machine Data (SIMODRIVE Drive MD)
7.2.2 FDD MD (data description - SW 3)
1418
Default value
0
Input of threshold speed for monitoring purposes; if the actual speed value does not reach the
set threshold speed in terms of absolute value, a message is transferred to the SERVO. The
monitoring function is not activated unless the default value is changed.
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. Machining movements via the
integrator in the case of non-linear controlled system characteristics (friction around the zero-
speed point) can thus be restricted or prevented.
Note:
The integrator feedback is activated when MD 1421 is set to 1.0.
1502
Default value
0
Input of time constant for speed setpoint filter (PT1 low-pass). The filter is deactivated when
the data is set to zero.
1600
Default value
0000
This machine data allows power on 611D alarms to be concealed. The monitoring function is
activated if the appropriate bit = 0. All 611D monitoring functions are activated as standard.
7–68
n for n < n
min act min
Lower input limit Upper input limit
0
Time constant integrator feedback
Lower input limit Upper input limit
0.0
Time constant speed setpoint filter
Lower input limit Upper input limit
0
Concealable power on 611D alarms
Lower input limit Upper input limit
0000
©
Siemens AG 1992 All Rights Reserved
Units
7 200 rev/min
Units
1 000.0 ms
Units
500 ms
Units
FFFF Hex
6FC5197- AA50
SINUMERIK 840C (IA)
12.93
Active
at once
Active
at once
Active
at once
Active
at once