Omron SYSDRIVE 3G3JV

5-20
H Operation in 2-wire Sequence (Set Value: 2)
• The Inverter operates in 2-wire sequence by setting a multi-function input parameter to 2 (reverse/
stop).
• The following diagram shows a wiring example of the terminals in 2-wire sequence.
Forward-rotation
switch
Reverse-rotation
switch
Forward/Stop (Forward rotation with the forward-rotation switch
closed and reverse-rotation switch opened)
Reverse/Stop (Reverse rotation with the reverse-rotation switch
closed and forward-rotation switch opened)
Sequence input common
j: 2 to 5
H Operation in 3-wire Sequence (n37 = 0)
• The Inverter operates in 3-wire sequence by setting n37 for multi-function input 2 to 0.
• Only n37 can be set to 0 (3-wire sequence). By making this setting, the set value in n36 is ignored and
the following settings are forcibly made.
S1: RUN input (RUN when ON)
S2: STOP input (STOP when OFF)
S3: Forward/Reverse rotation command (OFF: Forward; ON: Reverse)
• The following diagram shows a wiring example of the terminals in 3-wire sequence.
Stop switch
(NC)
Operation
switch (NO)
Direction switch
RUN input (RUN with the STOP switch and RUN switch closed)
STOP input (with the STOP switch opened)
Forward/Reverse rotation command (Forward rotation with the direction
switch opened and reverse rotation with the direction switch closed)
Sequence input common
H External Base Block Command (Set Value: 11, 12)
When an SPST-NO (setting: 12) or SPST-NC (setting: 13) input is received, Inverter outputs are shut
OFF. Use these inputs in the following cases to stop Inverter outputs.
S For switching the motor to free running status when applying an external brake.
S For stopping Inverter outputs before disconnecting motor wiring when changing the motor con-
nections from the Inverter to a commercial power supply.
Note The external base block only shuts OFF the Inverter’s output frequency, and the Inverter’s inter-
nal frequency continues to be calculated as usual. Therefore, if the external base block is cleared
Basic Operation
Chapter 5