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Technical description 8100_ A
Output actual value
= set-value: see C240
Frequency pilot contral: see C238
Frequency setting range: see C239
Input integral component = 0
Using this function the integral component of the PI controller can be reset to zero.
You can activate this auxiliary function by one of the freely assignable inputs with
C113.
This function is useful, for example in applications where a drive is to be brought to
standstill with zero set-value and is to remain stationary and ready for operation
without controller inhibit. Blanking out the I-component prevents the motor from
drifting. If the drive is mechanically braked at set-value zero, blanking out the 1-
component prevents the drive from jerking when the brakes are released.
Output actual value
= 0
The digital output function actual value = 0 indicates that the drive is stationary.
The range in which the function is active is provided with a fixed window of 0.5%
referenced to fdmax.
This characteristic can be used for example in cases where the I-component has to
be blanked out.
The signal actual value
= 0 can be assigned to a digital output terminal using C117.
7.2.12 MASTER CURRENTC034
If the analog set-value must be entered as master current via terminal 8, adjust the
setting range under C034 as folIows:
0...20mA: C034
= -0-
4...20mA: C034
= -1-
T0 change from master voltage to master current, using switch 51/4 on the control
module. For the position of the switch see 4.3.
Master voltage/potentiometer: 51/4
= OFF
Master current: 51/4
= ON
Factory setting: 51/4 = OFF
7.2.13 BRAKEVOLTAGEC036
The brake voltage is used to set the DC component flowing in the motor. For
activation of the DC brake see C048 (see 7.3.7).
lenze
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