Start Signal Selection (Terminal Stf, Str, Stop, Pr. 250) - Mitsubishi Electric FR-A700 Instruction Manual

Function assignment of external terminals
6.14.4

Start signal selection (Terminal STF, STR, STOP, Pr. 250)

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 section 6.13.3 for stop selection.)
Pr. Initial
Name
No. Value
250
Stop selection 9999
2-wire type (terminals STF and STR)
A two-wire type connection is shown below.
In the initial 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 cor-
responding direction. If both are turned off (or on) during operation, the inverter decelerates to
a stop.
The speed setting signal may either be given by entering 0 to 10V DC across the speed setting
input terminal 2-5, by setting the required values in Pr. 4 to Pr. 6 "Multi-speed setting" (high, mid-
dle, low speeds), etc. (For multi-speed operation, refer to section 6.10.1.)
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.
Forward rotation start
Reverse rotation start
6 - 294
Description
Setting
Start Signal
Range
(STF/STR)
STF: Forward
rotation start
0–100s
STR: Reverse rotation
start
STF: Start signal
1000s–
STR: Forward/reverse
1100s
signal
STF: Forward
rotation start
9999
STR: Reverse
rotation start
STF: Start signal
8888 STR: Forward/reverse
signal
Inverter
ON
ON
Stop Operation
The motor is coasted to a
stop when the preset time
elapses after the start signal
is turned off.
The motor is coasted to a
stop (Pr. 250 − 1000)s after
the start signal is turned off.
When the start signal is
turned off, the motor decel-
erates to stop.
Fig. 6-127:
2-wire type connection (Pr. 250 = 9999)
Time
Parameter
Refer to
Parameters referred to
Section
4–6 Multi-speed 6.10.1
setting
178–189 Input terminal 6.14.1
function
selection
I001148E