Fuji Electric Frenic lift, Reference Manual

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Time
0
ON
FWD (REV )
ON
Reference torque
RTDEC
Output gate
Stop speed
ON
(B) Initial torque bias
ALM2
ALM
L56
Time
0
ON
FWD (REV )
ON
Reference torque
doesn't decrease
RTDEC
Output gate
Stop speed
ON
(B) Initial torque bias
ON ALM2
ON ALM
■
Initial torque bias and reference torque decreasing (Bit 2)
The following functions can be used, when this function is enabled.
a) Initial torque bias
The operation of initial torque bias is as follows.
- Turning the inverter main circuit (output gate) ON holds a reference torque bias. It is the set point of
torque bias. It is indicated as (A).
- Reference torque bias starts at initial torque bias. It is indicated as (B) which is calculated as
follows.
100
L57
(A) (B) × =
- The reference torque bias is increased from (B) to (A). The time is set in function code L55.
Output gate
Torque bias
(analog input)
Reference
torque bias
ON
L55
(B)
（A)
（A) = Set point of torque bias.
（B) = （A)×
100
L57
(A)
Initial torque
bias.
Set point of torque bias.
b) Reference torque decreasing
The operation of reference torque decreasing is as follows.
1.
RTDEC
is changed from OFF to ON within three seconds after the starting operation.
Or, when the operation is started, RTDEC is already ON.
2. When RTDEC is changed from ON to OFF
When all the above-mentioned are satisfied, the inverter decreases the reference torque to initial
torque bias. The time taken to the decrease is L56. In the absolute value, if the reference torque when
RTDEC
is turned OFF (A1) is not decreased. When L98 bit1 = 1, drive continuance alarm (
ALM2
) is
output and the inverter stops with Er6 , otherwise, the inverter stops with Er6 immediatelly. When
RTDEC is changed from ON to OFF while the inverter is stopping, the inverter trips with Er6 .
Normal operation
Abnormal operation
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