MITSUBISHI ELECTRIC FR-S520 - Manual (Page 38)

29
1
(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 signal 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 terminal 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 signal STR
(STF)-SD once, then open it.
(Note) Assign the stop signal to any of
Pr. 60 to Pr. 62 (input terminal
function selection).
3) The inverter is decelerated to a stop by
opening the signal STOP-SD once. For
the frequency setting signal and the
operation of DC dynamic 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.
Reverse
rotation start
NFB
Time
STF
STR (Pr.63= "- - -" )
SD
STOP
Start
Stop
ON
ON
Power
supply
R
1
>,S,T
Inverter
Out
put
fr
equenc
y
Stop
Forward
rotation start
3-wire type connection example
4) When the signal JOG-SD is shorted, the STOP signal is invalid and the JOG signal
has precedence.
5) If the output stop signal MRS-SD is shorted, the self-holding function is not
deactivated.
DC Injection Brake and Coasting to Stop functionality
Operation
Mode
External Operation or Combined
Operation
Pr. 79 = "0", "2", "3"
PU Operation or Combined
Operation
Pr. 79 = "0", "1", "4"
DC Injection
Brake
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.
*1: Also stopped by the
STOP
RESET
key. Refer to page 94.