Omron VARISPEED E7 User Manual page 167

Performing Operations Using 3-Wire Control
When any parameter from H1-01 to H1-05 (multi-function digital input terminals S3 to S7) is set to 0, termi-
nals S1 and S2 are used for a 3-wire control, and the multi-function input terminal that has been set to 0 works
as a forward/reverse selection command terminal.
When the Inverter is initialized for 3-wire control with A1-03, multi-function input 3 becomes the input termi-
nal for the forward/reverse run command.
Forward/reverse command
NOTE
6-10
Operation switch
Stop switch
(NO contact)
(NC contact)
Fig 6.12 3-Wire Control Wiring Example
Run command
Stop command
OFF (forward)
Motor speed
Stop
Fig 6.13 Three-wire Control Time Chart
Use a control circuit that turns ON terminal S1 for 50 ms or longer for the run command. This will make
the run command self-holding in the Inverter.
Run command (operates when ON)
Stop command (stopped when ON)
Forward/reverse command (multi-function input)
SN
Digital input neutral
50 ms min.
Can be either ON or OFF
ON (reverse)
Forward Reverse
OFF
(stopped)
Stop Forward