Control Circuit - Mitsubishi FR-A800-E Instruction Manual

Control circuit

2.6
Control circuit
2.6.1
Details on the control circuit terminals
Input signal function of the terminals in
For the details of the control circuit terminal function selection, refer to the FR-A800 Instruction Manual (Detailed).
Input signal
Terminal
Terminal name
symbol
STF Forward rotation start
STR Reverse rotation start
STP Start self-holding
(STOP) selection
RH, RM,
Multi-speed selection
RL
Jog mode selection
JOG
Pulse train input
Second function
RT
selection
MRS Output stop
RES Reset
Terminal 4 input
AU
selection
Selection of automatic
restart after
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
34
INSTALLATION AND WIRING
can be selected by setting Pr.178 to Pr.196 (I/O terminal function selection).
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 signal (STF or STR) 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 s or longer,
then turn it OFF.
In the initial setting, reset is set always-enabled. Setting Pr.75
makes reset possible only after the occurrence of an inverter fault.
The inverter will restart about 1 s after reset.
The terminal 4 function is available only when the AU signal is
turned 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),
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 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 a
programmable controller, in the sink logic to avoid malfunction by

undesirable currents. (Refer to
Common terminal for contact input terminal (source logic).
(Refer to page 39.)
Can be used as a 24 VDC 0.1 A power supply.
When the STF and STR
signals are turned ON
simultaneously, the stop
command is given.
page 39.)
Rated specification
Input resistance 4.7 k
Voltage when contacts
are open: 21 to 27 VDC
When contacts are short-
circuited: 4 to 6 mADC
Input resistance 2 k
When contacts are short-
circuited: 8 to 13 mADC
Input resistance 4.7 k
Voltage when contacts
are open: 21 to 27 VDC
When contacts are short-
circuited: 4 to 6 mADC
—
Power supply voltage
range 19.2 to 28.8 VDC
Permissible load current
100 mA