Function Application
‑498‑
Figure 3‑6 Timing diagram of two‑wire mode 2
Three-Wire Mode 1
For example, DI3 is assigned with the three‑wire operation control function, DI1 is
assigned with the forward run function, and DI2 is assigned with the reverse run
function. In this control mode, start and stop of the AC drive must be controlled by
using keys on the AC drive. Connect the start/stop key to DI3, the forward run key to
DI1, and the reverse run key to DI2. The parameters are set as below.
Para. Name
Value
Description
F4‑11
Terminal control
mode
2
Three‑wire mode 1
F4‑00
DI1 function
selection
1
Forward run (FWD)
F4‑01
DI2 function
selection
2
Reverse run (REV)
F4‑02
DI3 function
selection
3
Three‑wire operation
control
SW3 is a normally‑closed key and SW1 and SW2 are normally‑open keys. When SW3 is
closed, the motor rotates in the forward direction if SW1 is pressed, and in the reverse
direction if SW2 is pressed. The motor stops immediately after SW3 is open. SW3 must
remain closed when the AC drive starts or is running. Commands from SW1 or SW2
take effect immediately after SW1 or SW2 is closed.
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