5-16
F13
Electronic thermal overload relay (for External braking resistor)
This function controls the operation frequency of the braking resistor and the continuous operation
hours to prevent the braking resistor from being overheated.
Setting
0: Inactive
1: Active (For external braking resistor DB -2C/4C)
2: Active (For external braking resistor TK80W120Ω) [0.1 to 2.2E11S-7]
Active (For external braking resistor DB -4C) [0.4 to 7.5E11S-4]
F14 Restart mode after momentary power failure
Select the operation to be taken by the inverter upon momentary power failure.
You can select between protective operation (alarm output, alarm display, and inverter output shutoff)
upon detection of power failure to be taken against an undervoltage and restart after momentary power
failure where the coasting motor is not stopped but automatically restarted after the source voltage is
recovered.
Setting range: 0 to 3 (Refer to the table below for details of the function.)
Setting
Name of function Operation upon power failure
Operation upon power
recovery
0
Inactive after
momentary power
failure (The inverter
trips immediately.)
Upon detection of an undervoltage, a
protective function is activated to stop the
output.
The inverter
does not
restart.
1
Inactive after
momentary power
failure (The inverter
trips after the power is
recovered.)
Upon detection of an undervoltage, no
protective function is activated but the
output is stopped.
A protective
function is
activated;
the inverter
does not
restart.
The inverter
restarts after
the
protective
function is
reset and an
operation
command is
input.
2
Restart after
momentary power
failure (The inverter
restarts at the
frequency effective at
the time of power
failure.)
Upon detection of an undervoltage, no
protective function is activated but the
output is stopped.
The inverter automatically
restarts at the output
frequency effective at the
time of power failure.
3
Restart after
momentary power
failure (The inverter
restarts at the starting
frequency; for low
inertia loads.)
Upon detection of an undervoltage, no
protective function is activated but the
output is stopped.
The inverter automatically
restarts at the starting
frequency set at F23.
Function codes used for the restart after momentary power failure include H13 and H14. Refer to the
description of these codes, too. As well, a rotating motor pickup function can be selected as a
starting method after a momentary power failure. (Refer to function code H09 for details of setting.)
When the pickup function is used, the speed of the coasting motor is detected and the motor is
started without a shock. Because a speed detection time is necessary if the pickup function is made
effective, the pickup function should be made ineffective and restart should be made at the frequency
effective before the power failure in a system with a large inertia to restore the original frequency, to
make the most of the small decrease in the speed of the coasting motor.
The effective range of the pickup function is 5 to 120 Hz. If the detected speed is out of the effective
range, the inverter restarts according to the regular function of restart after momentary power failure.
To Next Page
Loading...
