YASKAWA A1000 Technical Manual page 105

Setting 0: 3-Wire Sequence
The digital input programmed for 3-Wire control becomes the forward/reverse directional input, S1 becomes the Run command
input, and S2 becomes the Stop command input.
The drive starts the motor when the input S1 set for the Run command closes for longer than 2 ms. The drive stops the operation
when the Stop input S2 releases for 2 ms. When the digital input programmed for a forward/reverse operation is open, the
drive is set for forward operation. When the digital input is closed, the drive is set for reverse operation.
Note: Input the Run and Stop commands via S1 and S2 when selecting a 3-Wire sequence.
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 automatically issue the Run command upon drive power
up.
WARNING! Sudden Movement Hazard. Ensure start/stop and safety circuits are wired properly and in the correct state before applying
power to the drive. Failure to comply could result in death or serious injury from moving equipment.
WARNING! Sudden Movement Hazard. 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.
n H2-01 to H2-03: Terminal M1-M2, M3-M4, and M5-M6 Function Selection
The drive has three multi-function output terminals.
H2-02, and H2-03.
No.
H2-01 Terminal M1-M2 Function Selection (relay)
H2-02 Terminal M3-M4 Function Selection (relay)
H2-03 Terminal M5-M6 Function Selection (relay)
Setting
0 During Run
1 Zero Speed
2 Speed Agree 1
3 User-Set Speed Agree 1
4 Frequency Detection 1
YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
Stop Switch Run Switch
(N.C.) (N.O.)
Figure 4.22 3-Wire Sequence Wiring Diagram
2 ms min.
OFF (forward)
Stop Forward
Figure 4.23 3-Wire Sequence
Table 4.26
Parameter Name
Table 4.26 Multi-Function Digital Output Terminal Settings
Function
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
Can be either ON or OFF
OFF (stopped)
ON (reverse)
Reverse
lists the functions available for theses terminals using H2-01,
Page Setting
— 5 Frequency Detection 2
— 6 Drive Ready
106 7 DC Bus Undervoltage
106 8 During Baseblock (N.O.)
— 9 Frequency Reference Source
4.6 Basic Drive Setup Adjustments
TIME
Stop Foward
Setting Range
0 to 192 0: During run
0 to 192 1: Zero Speed
0 to 192 2: Speed agree 1
Function
Default
4
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