GE Fuji Electric AF-300ES Instructions Manual page 66

LCD
GRAPHIC
FUNCTION DISPLAY
* 16 BRK TORQUE
* 17 DC BRK Hz
* 18 DC BRK LVL
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SETTING DESCRIPTION
BRAKING TORQUE
This limit puts a hard clamp on the amount
of torque which the drive will provide
in the braking direction (i.e. absorbing
power). It is set as a percentage of rated
torque and is adjustable from 20 to 180%.
Setting this Function Code to 999 will
remove the limit.
A setting of zero (0) will activate auto-
matic deceleration control. This feature
will decelerate according to programmed rate
unless the absorption capability of the In-
verter is exceeded. Normally this would result
in a dc link overvoltage fault (OU2) but auto-
matic deceleration control will stop decelera-
tion long enough to avoid tripping. This
feature should not be used if smooth decel
torque is a requirement. Instead set torque
limit according to dynamic braking capability
and deceleration time proportionate to load
inertia to avoid overvoltage faults.
CAUTION: Setting this Function Code too low when compared to actual load
requirement could cause the motor to decelerate slower than the decel time setting.
If motor decel exceeds three (3) times the decel time setting, Torque Limiter
(Braking) will be ignored.
DC INJECTION BRAKE STARTING Hz
DC injection braking can provide an effective
means of stopping the motor, especially after
the motor has already reached a low speed
This setting determines the frequency at which
dc braking takes affect during a deceleration.
Adjustable from 0 to 60 Hz. (See related
Function Codes 18 and 19).
DC INJECTION BRAKE LEVEL (STRENGTH)
The dc injection braking level is adjustable
from 0 to 100%. Note that the actual braking
strength is dependent on the motor character-
istics. (See related Function Codes 17 and 19.)
6-8
FACTORY
SETTING
999
0.0
0.0%