Mitsubishi Electric Freqrol-A100 Instruction Manual page 152

4.7.2 Adjustment
Function
Number
Description
Setting
Range
Factory
Setting
Remarks
Commercial power supply-inverter switching sequence output terminal
selection
O...Sequence output is not provided (this function is not performed)
1
...
Relay output terminals of the FR-EPE are used.
2...O~en collector output terminals of the inverter are used.
MC switching interlock timer time
Set waiting time to prevent MC2 and MC3 from being turned on
simultaneously at the time of MC switching.
0 to 100
seconds
1
.o
second
Setting 0 seconds
results in 0.05
seconds setting.
Waiting time for automatic restart after instantaneous power failure
(MC3 ON waiting time)
Set a period equal to or longer than the time from when MC3 ON
signal is entered to when MC3 is actually turned on.
Commercial power supply operation switch-over selection at inverter
alarm
At inverter alarm (except external thermal relay), switch-over to com-
mercial power supply operation is carried out:
O...No
l...Yes
Setting 0 seconds
results in 0.05
seconds setting.
0 to 100
seconds
0, 1
0.5
seconds
0
Automatic inverter operation-commercial power supply operation
switch-over frequency
When automatic switch-over is executed, inverter operation is auto-
matically switched to commercial power supply operation at or above
the set frequency when the inverter has reached the set frequency.
9999:
Not automatically
switched.
Note: Pr. 11 1 is valid when Pr. 107 = 1 or 2.
I
After the motor started by the inverter has been switched to commercial power supply operation when the inverter
had reached the automatic switching frequency, the motor is not automatically switched to inverter operation if
the running frequency of the inverter is reduced to below the switching frequency.
To switch the motor to inverter operation again, switch the inverter running command terminal (STF or STR) sig-
nal from on to off, then to on.
4.7.3 Operation Sequence Example
MC2
&
a1 relay
4
+
'1. Note the capacity of the sequence output terminals.
4
'2. When the AC power supply is connected, fit the FR-
EPE option and use the relay contact output. When a
DC power supply is connected, provide the following
protective diode.
S i g n a l set in Pr. 40
Inverter start
(forward rotation)
STF IPF
Inverter/cornrnercial
power switch-over
Operation interlock
FU
External thermal
JOGIOH SE
relay reset
RES
SD
10
Frequency sening signal
2
5