YASKAWA A1000 Technical Manual page 236

5.7 H: Terminal Functions
Setting 0: 3-Wire Sequence
When one of the digital inputs is programmed for 3-wire control, that input becomes a forward/reverse directional input,
S1 becomes the Run command input, and S2 becomes the Stop command input.
The drive will start the motor when the input S1 set for the Run command is closed for longer than 2 ms. The drive will
stop the operation when the Stop input S2 is released. Whenever the input programmed for 3 wire sequence is open, the
drive will be set for forward direction. If the input is closed, the drive is set for reverse direction.
Note: When 3-wire sequence is selected, the Run and Stop commands must be input via S1 and S2.
Figure 5.58
Figure 5.59
Run command
Stop command
Forward/reverse
command
Motor speed
Note: 1. The Run command must be closed for more than 2 ms.
2. If the Run command is active at power up and b1-17 = 0 (Run command at power up not accepted), the Run LED will flash to
indicate that protective functions are operating. If required by the application, set b1-17 to 1 to have the Run command issued
automatically as soon as the drive is powered up.
WARNING! Sudden Movement Hazard. Ensure start/stop and safety circuits are wired properly and in the correct state before
energizing the drive. Failure to comply could result in death or serious injury from moving equipment.
WARNING! The drive may start unexpectedly in reverse direction after power up if it is wired for 3-wire sequence but set up for 2-wire
sequence (default). Make sure b1-17 is set to "0" (drive does not accept a Run command active at power up). When initializing the
drive use 3-wire initialization. Failure to comply could result in death or serious injury from moving equipment.
Setting 1: LOCAL/REMOTE selection
This setting allows the input terminal to determine if the drive will run in LOCAL mode or REMOTE mode.
Status
Closed LOCAL: Frequency reference and Run command are input from the digital operator.
REMOTE: Frequency reference and Run command are input from the external reference that has been selected in accordance with settings of b1-01 and b1-02 or
Open
b1-15 and b1-16.
Note: 1. If one of the multi-function input terminals is set to for LOCAL/REMOTE, then the LO/RE key on the operator will be disabled.
2. When the drive is set to LOCAL, the LO/RE LED will light.
3. The default setting of the drive is not to allow switching between LOCAL and REMOTE during run. To allow the drive to switch
between LOCAL and REMOTE during run,
236
Stop Switch Run Switch
(N.C.) (N.O.)
Figure 5.58 3-Wire Sequence Wiring Diagram
2 ms min.
Can be either ON or OFF
OFF (forward)
Stop Forward
Figure 5.59 3-Wire Sequence
Refer to b1-07: LOCAL/REMOTE Run Selection on page
DRIVE
S1
Run Command (Runs when Closed)
S2
Stop Command (Stops when Open)
S5
FWD/REV (Multi-Function Input)
(H1-05 = 0)
SC
Sequence Input Common
2 ms min.
ON (reverse)
Reverse Stop
Description
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Can be either ON or OFF
Foward
156.