Siemens SINUMERIK 840C Installation Instructions Manual page 529

7 Drive Machine Data (SIMODRIVE Drive MD)
7.3.2 Drive MD (data description)
1250
Default value
100.0
Input of -3dB corner frequency f
pass) for display purposes. Time constant T1 of the PT1 filter is calculated from the formula
T1 = 1/(2 f ). The cross-current actual value is displayed in machine data "Smoothed current
o
actual value" (MD 1708). The smoothed cross-current actual value is likewise transferred to
the PLC data channel. This machine data has no effect on the control.
Note:
The filter is deactivated if values of < 1 Hz are entered.
1251
Time constant motor load (as from SW 6)
Default value
0.0
The set time constant is used to smooth the motor load signal (MD 1722) in order to obtain a
steadier display.
1252
Default value
100.0
Input of -3dB corner frequency fo of torque setpoint smoothing function (PT1 low-pass) for
display purposes. Time constant T1 of the PT1 filter is calculated from the formula T1 =
1/(2 f ). The smoothed value is transferred to the PLC data channel. This machine data has
o
no effect on the control.
Note:
The filter is deactivated if values of < 1 Hz are entered.
1254
Default value
0.5
Smoothing of current space vector for its monitoring (error 300501). Smoothing is used to
prevent unauthorized triggering of the monitoring when the current suddenly changes because
of the application, e.g. low-inductance, high-speed asynchronous motors.
7–114
Corner freq. curr. act. val. smooth.
Lower input value Upper input value
0.0
of cross-current actual value smoothing function (PT1 low-
o
Lower input value Upper input value
0.0
Corner freq. torque setp. smoothing
Lower input value Upper input value
0.0
Time constant current monitoring
Lower input value Upper input value
0.0
©
Siemens AG 1992 All Rights Reserved
Units
8 000.0
Units
1 000.0 ms
Units
8 000.0
Units
2.0 ms
6FC5197- AA50
SINUMERIK 840C (IA)
07.97
Active
at once
Hz
Active
at once
Active
at once
Hz
Active
at once