Control Circuit; Details On The Control Circuit Terminals - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

2.6

Control circuit

2.6.1

Details on the control circuit terminals

 Input signal
Terminal
Type Terminal name
symbol
*1
Forward rotation start
STF
*1
Reverse rotation start
STR
STP
Start self-holding
*1
selection
(STOP)
RH
RM
Multi-speed selection
*1
RL
Jog mode selection
*1
JOG
Pulse train input
Second function
*1
RT
selection
*1
Output stop
MRS
*1
Reset
RES
Terminal 4 input
*1
AU
selection
Selection of
automatic restart after
*1
CS
instantaneous power
failure
Contact input
common (sink)
External transistor
SD
common (source)
24 VDC power supply
common
External transistor
common (sink)
PC
Contact input
common (source)
24 VDC power supply Can be used as a 24 VDC 0.1 A power supply.
68
2. INSTALLATION AND WIRING
2.6 Control circuit
Terminal function 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 STP (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 enable JOG operation (initial
setting) and turn ON the start (STF or STR) signal to start
JOG operation.
Terminal JOG is also used as a pulse train input terminal. To
use as a pulse train input terminal, change the Pr.291
setting.
(maximum input pulse: 100k pulses/s)
Turn ON the RT signal to enable the second function.
When the second function such as "Second torque boost"
and "Second V/F (base frequency)" is set, turning ON the
RT signal enables the selected function.
Turn ON the MRS signal (20 ms or more) to stop the inverter
output. Use this signal to shut off the inverter output when
stopping the motor with an electromagnetic brake.
Use this signal to reset a fault output provided when a
protective function is activated. Turn ON the RES signal for
0.1 seconds or longer, then turn it OFF.
In the initial setting, reset is always enabled. By setting
Pr.75, reset can be enabled only at an inverter fault
occurrence. The inverter recovers about 1 second after the
reset is released.
The terminal 4 function is available only when the AU signal
is ON.
Turning the AU signal ON makes terminal 2 invalid.
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.
Common terminal for the contact input terminal (sink logic),
*3
terminal FM.
Connect this terminal to the power supply common terminal
of a transistor output (open collector output) device, such as
*4
a programmable controller, in the source logic to avoid
malfunction by undesirable current.
Common terminal for the 24 VDC power supply (terminal
PC, terminal +24).
Isolated from terminals 5 and SE.
Connect this terminal to the power supply common terminal
of a transistor output (open collector output) device, such as
*3
a programmable controller, in the sink logic to avoid
malfunction by undesirable current.
Common terminal for contact input terminal (source logic).
*4
Rated specification
When the STF and
STR signals are turned
ON simultaneously, the
stop command is
given. Input resistance: 4.7 kΩ,
voltage when contacts
are open: 21 to 27 VDC,
current when contacts are
short-circuited: 4 to 6
mADC
Input resistance: 2 kΩ,
current when contacts are
short-circuited: 8 to 13
mADC
Input resistance: 4.7 kΩ,
voltage when contacts
are open: 21 to 27 VDC,
current when contacts are
short-circuited: 4 to 6
mADC
—
Power supply voltage
range:
19.2 to 28.8 VDC,
permissible load current:
100 mA
Refer
to
page
502
502
391
390
386
500
499
320
473
597,
604
—
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