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Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual Page 163

Transistorized inverter, high function & low acoustic noise.
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(6) Operation
1) Ordinary operation
After completion of all preparations and settings, turn on the desired group select signal (any of RH
(group 1), RM (group 2) and RL (group 3)), then turn on the start signal (STF). This causes the internal
timer (reference time of day) to be reset automatically and the operation of that group to be performed
in sequence in accordance with the settings. When the operation of the group ends, a signal is output
from the time-out output terminal. (The open collector signal of SU is turned on.)
Note: Use the programmed operation function with "5" set in Pr. 79. Programmed operation will not be
performed if any of the group select signals is switched on during PU operation or data link
operation.
Start signal
STF
Group 1 RH
Inverter output
frequency
Time-out
signal (SU)
2) Multi-group select operation
When two or more groups are selected at the same time, the operations of the selected groups are
executed in sequence of group 1, group 2 and group 3.
For example, if group 1 and group 2 have been selected, the operation of group 1 is first carried out,
and after that operation ends, the reference time of day is reset, the operation of group 2 is started, and
the time-out signal (SU) is output after the operation of group 2 ends.
Start signal
STF
Group 1 RH
Group 2 RM
Inverter output
frequency
Group 1 select
signal (FU)
Group 2 select
signal (OL)
Time-out
signal (SU)
(7) To repeat the operation of the same group, reset the timer using the time-out signal as shown below.
1) To repeat the operation of only group 1
Inverter
STF
(Group 1) RH
(Group 2) RM
(Group 3) RL
STR
SD
SU
SE
Note: 1. If the inverter power is switched off, then on (including an instantaneous power failure) during the
execution of the programmed operation, the internal timer is reset and the inverter does not
restart if the power is restored.
To resume the operation, turn the programmed operation start signal (STF) off, then on. (At this
time, when it is required to set the reference time of day, switch the start signal on before setting.)
2. When the inverter is wired for programmed operation specifications, the following signals are
invalid:AU, STOP, 2, 4, 1, JOG
3. During programmed operation, the inverter cannot be operated in any other mode. When the
programmed operation start signal (STF) and timer reset signal (STR) are ON, the operation
mode cannot be switched between PU operation and external operation.
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f2
f3
f5
f1
f4
0
0
t1
t2
t3
t4 t5
t6
Setting of group 1
Note that the operation is not started if the
timer reset signal (STR) is on.
f3 f4
f2
f3
f5
f2
f1
f1
f4
0
0
0
t1
t2
t3
t4 t5
t1 t2 t3 t4 t5 t6
Setting of group 1
Setting of group 2
t'3
t'4
t'1
t'2 t'3
t'2
t'4 t'5
t'1
t'5
0
2) To repeat the operation of groups 1 and 2
150
PARAMETERS
Inverter
STF
(Group 1) RH
(Group 2) RM
(Group 3) RL
STR
SD
SU
SE

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