IMO VXSM75-1 Instruction Manual page 44

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 details contact IMO)
2:Active - (For details contact IMO)
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.)
Name of function
0 Inactive after
momentary power
failure (The inverter trips
immediately.)
1 Inactive after momentary
power failure (The
inverter trips after the
power is recovered.)
2 Restart after momentary
power failure (The
inverter restarts at the
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.)
Selecting Functions
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.
Operation upon power failure
Upon detection of an
undervoltage, a protective
function is activated to stop the
output.
Upon detection of an
undervoltage, no protective
function is activated but the
output is stopped.
Upon detection of an
undervoltage, no protective
function is activated but the
output is stopped.
Upon detection of an
undervoltage, no protective
function is activated but the
output is stopped.
Operation upon power recovery
The inverter does The inverter
not restart. restarts after
the protective
function is
reset and an
A protective function
operation
is activated; the
command is
inverter does not
input.
restart.
The inverter automatically restarts at
the output frequency effective at the
time of power failure.
The inverter automatically restarts at
the starting frequency set at F23.
5-15