Mitsubishi Electric FR-S500 Series Instruction Manual page 51

Explanation of the basic function parameters
Pr. 7 "acceleration time",
Pr. 8 "deceleration time"
As the acceleration time, set the time taken to
reach the acceleration/deceleration reference
frequency in Pr. 20 from 0Hz (factory set to
60Hz), and as the deceleration time, set the
time taken to reach 0Hz from the Pr. 20 value
(factory set to 60Hz).
Pr.20
0Hz
Acceleration time Deceleration time
Pr.7
Pr. 30 "extended function display selection"
Set this parameter when showing/setting the
extended function parameters
Setting Definition
Only basic functions
0
are displayed.
All parameters are
1
displayed.
The inverter has two different operation modes: operation under control of external signals
and operation from the PU (setting dial,
Setting
0
PU (setting dial,
1
PU (setting dial,
2
Only external operation may be performed.
Running frequency
• Setting made by the setting dial
3
• Multi-speed selection
• 4 to 20mA (Made valid when the AU
signal turns on)
Running frequency
4
External terminal signals (multi-speed, 0
to 5VDC, etc.)
PU operation interlock
7
(Switching to the PU operation mode is enabled/disabled by turning the MRS signal ON/
OFF)
Operation mode external signal switching (disabled during operation)
8
Turn the X16 signal ON/OFF to choose operation mode.
Pr.8
.
Pr. 79 "operation mode selection"
). You can use either or both operation modes.
RUN
Definition
) operation or external operation can be selected by the
RUN
) operation may be performed.
RUN
46
Pr. 9 "electronic thermal O/L relay"
You can set a current value for protection of
the motor from overheat. Normally, set the
rated motor current at 50Hz as it is.
At the setting of 0A, motor protection does not
function. (The output transistor protection of
the inverter functions.)
When connecting multiple motors to the
inverter, provide external thermal relays to
individual motors.
For the 0.75K or less, this value is factory-set
to 85% of the rated inverter current.
Turn the RT signal on to select the second
electronic thermal relay function. (Refer to
page 58.)
Start signal
External terminal (STF/STR)
Start signal
RUN
PU
.
EXT