The frequency converter firstly identifies the rotation speed and direction of
the motor and then starts with the current frequency of the motor to realize
smooth starting without shock to the rotating motor.
f
upper
Upper frequency
f
set
Set frequency
f
Motor
Motor frequency
Fig. 8-10: Start with speed capture
When the frequency converter is starting and accelerating, if the set
frequency is lower than the "Starting frequency" [b1.31], the fre-
quency converter firstly starts at the starting frequency and runs for
"Starting frequency holding time" [b1.32], and then decelerates to
the set frequency.
The actual starting DC braking current is calculated as below:
● If the x % of rated frequency converter current is lower than the rated motor
current, then the actual starting DC braking current is x % of rated frequency
converter current.
● If the x % of rated frequency converter current is higher than the rated motor
current, then the actual starting DC braking current is the rated motor cur-
rent.
Example: For a frequency converter of 0K75 / 200 V, the rated current is 3.9 A,
the motor rated current is 3.45 A, when b1.34 input is 100 %, the actual starting
DC braking current is 3.45 A.
8.2.4 Stopping Configuration
b1.40 Stopping mode
Setting range 0 ~ 2
Minimum unit 1
Factory default 0
● 0: Decelerating to stop
Bosch Rexroth AG
Parameter Settings
EFC 3600
64/259
DOK-RCON03-EFC-3600***-IT03-EN-P
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