Control Circuit - Mitsubishi Electric 800 Series Instruction Manual

2.6

Control circuit

2.6.1
Details on the control circuit terminals
Input signal function of the terminals in
(Refer to page 415.)
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
CS
after 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.
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. By setting Pr.75,
reset can be set enabled only at fault occurrence. The inverter
recovers about 1 s after the reset is released.
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.
Common terminal for contact input terminal (source logic).
specification
When the STF and
STR signals are turned
Input resistance
ON simultaneously, the
4.7 k
stop command is given.
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
INSTALLATION AND WIRING
Control circuit
Refer
Rated
to
page
421
421
314
312
308
419
418
2
244
393
515
—
48
43