Lenze Range 7800 - Manual (Page 25)

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Function code 21
This functian allows tor a comparison between the momentary
rotational field trequency and a programmed trequency. lt the two
trequencies are ideritical, the output „SAR“ is activated tor at
least 100 insec. The compared treguency is set in Hz.
(Factory setting is 50 Hz).
Function code 22
The opto-coupler output T‘SST“ Is activated lt the rotational field
freguency duririg the deceleration phase is smaller than or equal to
the programmed frequency (0 to 3 Hz). The output is active tor ~t
least 100 msec. The compared freguency is set accordlng to the
tollowing table.
Data code
Inverter autput
treguency
[Hz]
Function code 23
Function code 23 determines the motor‘s mode at operation in the
deceleration phase.
Data code
00 : lt the rotational tield trequency has reduced
to < 2 Hz, the motor idles.
01 This data code must be selected, it the
inverter is to be operated with the braking
chopper.
~ lt the ratational tield trequency has reduced
tO < 2Hz, the motor is braked down to standstill
~~iith DC injectian current.