7 Drive Machine Data (SIMODRIVE Drive MD) 12.93
7.2.2 FDD MD (data description - SW 3)
n
min
for n
act
< n
min
1418
Default value Lower input limit Upper input limit Units
0 0 7 200 rev/min
Active
at once
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.
Time constant integrator feedback
1421
Default value Lower input limit Upper input limit Units
0.0 0.0 1 000.0 ms
Active
at once
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.
Time constant speed setpoint filter
1502
Default value Lower input limit Upper input limit Units
0 0 500 ms
Active
at once
Input of time constant for speed setpoint filter (PT1 low-pass). The filter is deactivated when
the data is set to zero.
Concealable power on 611D alarms
1600
Default value Lower input limit Upper input limit Units
0000 0000 FFFF Hex
Active
at once
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 ©
Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)
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