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Function assignment of external terminal and control
4.12.4 Start signal operation selection (STF, STR, STOP signal, Pr.250)
The above parameters can be set when Pr.160 Extended function display selection = "0". (Refer to page 182)
(1) Two-wire type connection (STF, STR signal)
The two-wire connection is shown below.
In the default setting, the forward/reverse rotation signals (STF/STR) are used as start and stop signals. Turn ON either
of the forward and reverse rotation signals to start the motor in the corresponding direction. Switch both OFF (or both
ON) of the start signals during operation to decelerate the drive unit to a stop.
The speed setting signal may either be given by entering 0 to 10VDC across the speed setting input terminal 2-5, by
setting the required values in Pr.4 to Pr.6 Multi-speed setting (high, middle, low speeds), etc.
(For multi-speed operation, refer to page 117.)
When Pr.250 is set to any of "1000 to 1100, 8888", the STF signal becomes a start command and the STR signal a
forward/reverse command.
You can select the operation of the start signal (STF/STR).
Used to select the stopping method (deceleration to a stop or coasting) when the start signal turns OFF.
Used to stop the motor with a mechanical brake, etc. together with switching OFF of the start signal.
(Refer to page 137 for stop selection)
Parameter
number
Name
Initial
value
Setting range
Description
Start Signal
(STF/STR)
Stop Operation
(Refer to page 137)
250 Stop selection
9999
0 to 100s
STF signal: Forward rotation start
STR signal: Reverse rotation start
The motor is coasted to a
stop when the preset time
elapses after the start
signal is turned OFF.
1000s to 1100s
STF signal: Start signal
STR signal: Forward/reverse signal
When the setting is any of
1000s to 1100s, the drive
unit coasts to a stop in
(Pr.250 - 1000)s.
9999
STF signal: Forward rotation start
STR signal: Reverse rotation start
When the start signal is
turned OFF, the motor
decelerates to stop.8888
STF signal: Start signal
STR signal: Forward/reverse signal
2-wire connection example (Pr.250 = "9999") 2-wire connection example (Pr.250 = "8888")
REMARKS
When Pr.250 is set to any of "0 to 100, 1000 to 1100", turning OFF the start command coasts the drive unit to a stop. (Refer to
page 137)
The STF and STR signals are assigned to the STF and STR terminals in the default setting. The STF signal can be assigned to
Pr.178 STF terminal function selection, and the STR signal to Pr.179 STR terminal function selection.
Forward rotation
start
Reverse rotation
start
STF
ON
Time
STF
STR
SD
Drive unit
Speed
STR
ON
10
2
5
Forward
rotation
Reverse
rotation
Start signal
Forward/reverse
signal
STF
ON
Time
STF
STR
SD
Drive unit
Speed
STR
ON
10
2
5
Forward
rotation
Reverse
rotation