Mitsubishi Electric FR-S500 Instruction Manual page 35

Explanation of the basic function parameters
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. 79 "operation mode selection"
). You can use either or both operation modes.
RUN
Definition
RUN
) operation or external operation can be selected by the
RUN ) operation may be performed.
30
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 0.1K to 0.75K, 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 40.)
Start signal
External terminal (STF/STR)
Start signal
RUN
PU
.
EXT