Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 74 / 1218

Control circuit Installation and wiring
2 - 44
2.6 Control circuit
2.6.1 Details on the control circuit terminals
Input signal function of the terminals in grey shaded fields can be selected by setting Pr. 178
to Pr. 196 (I/O terminal function selection). (Refer to page 5-439.)
Input signal
Ty
p
e
Terminal
symbol
Terminal name Terminal function description
Rated
specification
Refer
to
page
Co
nt
a
ct
in
p
u
t
STF
Forward rotation
start
Turn ON the STF signal to start
forward rotation and turn it OFF to
stop. When the STF
and STR signals
are turned ON
simultaneously,
the stop
command is
given.
Input resistance
4.7 k
Ω
Voltage when
contacts are open:
21 to 27 V DC
When contacts are
short-circuited:
4 to 6 mA DC
5-447
STR
Reverse rotation
start
Turn ON the STR signal to start
reverse rotation and turn it OFF to
stop.
STP
(STOP) Start self-holding
selection Turn ON the STP (STOP) signal to self-hold the start
signal.
5-447
RH, RM, RL
Multi-speed
selection Multi-speed can be selected according to the
combination of RH, RM and RL signals.
5-299
JOG
Jog mode selection
Turn ON the JOG signal to enable JOG operation
(initial setting) and turn ON the start signal (STF or
STR) to start JOG operation.
5-296
Pulse train input
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)
Input resistance
2 k
Ω
When contacts are
short-circuited:
8 to 13 mA DC 5-292
RT
Second function
selection
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.
Input resistance
4.7 k
Ω
Voltage when
contacts are open:
21 to 27 V DC
When contacts are
short-circuited:
4 to 6 mA DC
5-445
MRS Output stop
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.
5-443
RES Reset
Use this signal to reset a fault output provided when a
protective function is activated. Turn ON the RES
signal for 0.1 s or longer, then turn it OFF.
In the initial setting, reset is set always-enabled. By
setting Pr. 75, reset can be set enabled only at fault
occurrence. The inverter recovers about 1 s after the
reset is released.
5-200
AU
Terminal 4 input
selection
The terminal 4 function is available only when the AU
signal is turned ON.
Turning the AU signal ON makes terminal 2 invalid.
5-406
CS
Selection of
automatic restart
after instantaneous
power failure 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.
5-581
5-590
SD
Contact input
common (sink)
Common terminal for the contact input terminal (sink
logic), terminal FM.
⎯ ⎯
External transistor
common (source)
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
current.
24 V DC power
supply common
Common terminal for the 24 V DC power supply
(terminal PC, te24)
Isolated from terminals 5 and SE.
Tab. 2-13: Input signals (1)