GE Industrial Solutions AF-300C AC Drive - Manual (Page 80)

AF-300C GEK-85718
Torque Limiter
(Motoring and Braking)
Function 33 Motoring Torque Limit
Function 34 Braking Torque Limit
-- Torque is calculated from the output voltage and
current of the inverter.
-- This function can improve impact load restora-
tion characteristics during and con-
stant speed operations and improve instantane-
ous restart ability.
Avoidance Control
Set braking torque limit to and power regenera-
tion to the inverter will be limited to obtain decelera-
tion characteristics close to coasting.
Automatic
Even if the acceleration and deceleration time is re-
duced to less than the time fixed by load inertia,
automatic acceleration and deceleration can be
maintained by maintaining the torque limit level.
NOTE: To obtain more torque on deceleration,
optional brake unit and brake resistor will be re-
quired.
Torque Limit Setting Range (Motoring and
Braking)
-- Set to to render inactive.
-- Adjustable from 20 to 180%.
NOTE: The data setting for Function Code 34 is
100% (assuming that a braking resistor is con-
nected). If no braking resistor is connected, setting
should be changed to 15% or less. If left at
an overvoltage trip will occur during deceleration if
the
time setting is too shortforthe motor/load
inertia.
Function 35 Frequency Detection Threshold
This signal is active (On) when the
exceeds the detection level.
This is an open collector output.
If the optional relay unit is used, this signal can be
used as a dry contact output.
Torque
(Motoring)
Slip = 0
Slip
(Braking)
signal
Time
6-6