6-8
Performing Operations Using a 3-wire Sequence
When any parameter from H1-01 to H1-10 (multi-function contact input terminals S3 to S12) is set to 0, ter-
minals S1 and S2 are used for a 3-wire sequence, and the multi-function input terminal that has been set func-
tions as a forward/reverse run command terminal.
When the Drive is initialized for 3-wire sequence control with A1-03, multi-function input 3 becomes the
input terminal for the forward/reverse run command.
Fig 6.9 3-wire Sequence Wiring Example
Fig 6.10 Three-wire Sequence Time Chart
Use a sequence that turns ON terminal S1 for 50ms or longer for the run command. This will make the run
command self-holding in the Drive.
Stop switch
(NC contact)
Operation switch
(NO contact)
Run command
(operates when ON)
Stop command
(stopped when ON)
Forward/reverse command
(multi-function input)
Sequence input common
50ms min.
Run command
Forward/reverse
command
Motor speed
Can be either ON or OFF
OFF
(stopped)
OFF (forward)
ON (reverse)
Stop Forward Reverse Stop Forward
Stop command
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