Control Circuit Specifications; Control Circuit Terminals - Mitsubishi Electric FR-A720-00030-NA Instruction Manual

Control circuit specifications

2.3 Control circuit specifications

2.3.1

Control circuit terminals

indicates that terminal functions can be selected using Pr. 178 to Pr. 196 (I/O terminal function selection) (Refer to page 235.)
(1) Input signals
Terminal Terminal
Symbol Name
Forward
STF
rotation start
Reverse
STR
rotation start
Start self-
STOP holding
selection
RH,
Multi-speed
RM, RL selection
Jog mode
selection
JOG
Pulse train
input
Second
RT function
selection
MRS Output stop
RES Reset
Terminal 4 input
selection
AU
PTC input
Selection of
automatic
CS restart after
instantaneous
power failure
Contact input
common
(sink)
(initial setting)
External
SD transistor
common
(source)
24VDC power
supply
common
26
Description
Turn ON the STF signal to start forward
rotation and turn it OFF to stop.
Turn ON the STR signal to start reverse
rotation and turn it OFF to stop.
Turn ON the STOP signal to self-hold the start signal.
Multi-speed can be selected according to the combination of RH,
RM and RL signals.
Turn ON the JOG signal to select Jog operation (initial setting)
and turn ON the start signal (STF or STR) to start Jog operation.
JOG terminal can be used as pulse train input terminal. To use as
pulse train input terminal, the Pr. 291 setting needs to be changed.
(maximum input pulse: 100kpulses/s)
Turn ON the RT signal to select second function.
When the second function such as "second torque boost" and
"second V/F (base frequency)" are set, turning ON the RT signal
selects these functions.
Turn ON the MRS signal (20ms or more) to stop the inverter
output.
Use to shut off the inverter output when stopping the motor by
electromagnetic brake.
Used to reset fault output provided when fault occurs.
Turn ON the RES signal for more than 0.1s, then turn it OFF.
Initial setting is for reset always. By setting Pr. 75, reset can be set
to enabled only at fault occurrence. Recover about 1s after reset
is cancelled.
Terminal 4 is valid only when the AU signal is turned ON. (The
frequency setting signal can be set between 4 and 20mADC.)
Turning the AU signal ON makes terminal 2 (voltage input)
invalid.
AU terminal is used as PTC input terminal (thermal protection of
the motor). When using it as PTC input terminal, set the AU/PTC
switch to PTC.
When the CS signal is left ON, the inverter restarts automatically
at power restoration. Note that restart setting is necessary for this
operation. In the initial setting, a restart is disabled.
(Refer to Pr. 57 Restart coasting time in page 270)
Common terminal for contact input terminal (sink logic) and
terminal FM.
Connect this terminal to the power supply common terminal of a
transistor output (open collector output) device, such as a
programmable controller, in the source logic to avoid malfunction
by undesirable currents.
Common output terminal for 24VDC 0.1A power supply (PC
terminal).
Isolated from terminals 5 and SE.
Specifications
When the STF and STR
signals are turned ON
Input resistance
simultaneously, the stop
4.7k
command is given.
Voltage at
opening: 21 to
27VDC
Contacts at
short-circuited: 4
to 6mADC
Input resistance
2k
Contacts at
short-circuited: 8
to 13mADC
Input resistance
4.7k
Voltage at
opening: 21 to
27VDC
Contacts at
short-circuited: 4
to 6mADC
Rated Refer to
page
235
235
235
235
235
235
235
235
291
188
235
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