YASKAWA A1000 Series Quick Start Manual page 81

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 for a brief moment. 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 67
Figure 68
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.
■ H2-01 to H2-03: Terminal M1-M2, P1-PC, and P2-PC Function Selection
The drive has three multi-function output terminals.
01, H2-02, and H2-03.
No.
H2-01
Terminal M1-M2 Function Selection (relay)
H2-02
Terminal P1-PC Function Selection (open-collector)
H2-03
Terminal P2-PC Function Selection (open-collector)
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Stop Switch Run Switch
(N.C.) (N.O.)
S1
S2
S5
SC
Figure 67 3-Wire Sequence Wiring Diagram
2 ms min.
Can be either ON or OFF
OFF (forward)
Stop Forward
Figure 68 3-Wire Sequence
Table 41
Parameter Name
4 Start-Up Programming & Operation
DRIVE
Run Command (Runs when Closed)
Stop Command (Stops when Open)
FWD/REV (Multi-Function Input)
(H1-05 = 0)
Sequence Input Common
OFF (stopped)
ON (reverse)
Reverse Stop
lists the functions available for theses terminals using H2-
Setting Range
0 to 192
0 to 192
0 to 192
TIME
Foward
Default
0: During run
1: Zero Speed
2: Speed agree 1
4
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