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26
Input terminals
*1: Also stopped by the . Refer to page 105.
(2) Three-wire type connection (STF, STR, STOP)
A three-wire type connection is shown on
the right. Assign the start self-holding
signal (STOP) to any of the input terminals.
To make a reverse rotation start, set Pr. 63
to "- - -" (factory setting).
1) Short the signals STOP-SD to enable
the start self-holding function. In this
case, the forward/reverse rotation signal
functions only as a start signal.
(Note) Assign the stop signal to any of
Pr. 60 to Pr. 62 (input terminal
function selection).
2) If the start signal terminals STF (STR)-
SD are shorted once, then opened, the
start signal is kept on and starts the
inverter. To change the rotation direction,
short the start signals STR (STF)-SD
once, then open it.
3) The inverter is decelerated to a stop by
opening the signals STOP-SD once. For
the frequency setting signal and the
operation of DC injection brake at a stop
time, refer to paragraphs 2) to 4) in (1)
Two-wire type connection. The right
diagram shows 3-wire type connection.
4) When the signals JOG-SD are shorted, the STOP signal is invalid and the JOG
signal has precedence.
5) If the output stop signals MRS-SD are shorted, the self-holding function is not
deactivated.
DC Injection Brake and Coasting to Stop Functionality
Operation
Mode
DC Injection
Brake
External Operation or Combined
Operation
Pr. 79 = "0", "2", "3"
PU Operation or Combined
Operation
Pr. 79 = "0", "1", "4"
Terminals STF
(STR)-SD
disconnected
(*1)
Set frequency
changed to 0Hz
Stop key
Set frequency
changed to 0Hz
DC injection
brake enabled
DC injection brake
operated at not
more than "DC
injection brake
operation
frequency" set in
Pr. 10
DC injection brake
operated at 0.5Hz
or less.
DC injection brake
operated at not
more than "DC
injection brake
operation
frequency" set in
Pr. 10
DC injection brake
operated at 0.5Hz
or less.
DC injection
brake disabled
Coasted to a stop
at not more than
"DC injection
brake operation
frequency" set in
Pr. 10
Coasted to a stop
at 0.5Hz or less.
Coasted to a stop
at not more than
"DC injection
brake operation
frequency" set in
Pr. 10
Coasted to a stop
at 0.5Hz or less.
Reverse
rotation start
NFB
Time
STF
STR (Pr.63= "- - -" )
STOP
Start
Stop
ON
ON
Power
supply
Inverter
Output frequency
Stop
Forward
rotation start
3-wire type connection example
SD
R, S, T
STOP
RESET