1，首先使用usb转485连接到主板和电脑，注意，使用AB两根就够了，如果通信不上就交互AB
2，打开网站，https://wiki.pibot.com/485-vfd-sim/ 使用默认设置即可
3，使用webui上发送指令， 输入 M6 T3 输入 M3 S12000 有显示变化 输入 M4 S24000 有显示变化
3.3 Test RS485 Output
Advanced Tests · Optional · Use a USB-to-RS485 adapter and VFD simulator to verify RS485 commands
ℹ️
Objective: This section verifies that the controller can send RS485 VFD commands correctly. A USB-to-RS485 adapter and a computer are required for this test.
⚠️
NOTE: Only the A and B wires are required for this test. If communication does not work, swap A and B, then try again.
1
Connect USB-to-RS485 Adapter
- Connect the USB-to-RS485 adapter to your computer.
- Connect the adapter A and B wires to the RS485 terminal on the controller board.
- Use only two wires: A and B.
- If the simulator shows no response later, swap A and B.
2
Open the VFD Simulator
- Open the simulator website on your computer:
- https://wiki.pibot.com/485-vfd-sim/
- Use the default serial settings: 9600 8 N 1
- Select the COM port of your USB-to-RS485 adapter and connect.
Reference image: RS485 VFD simulator page. Keep the default setting at 9600 8N1.
3
Send Test Commands from WebUI
- Open the controller WebUI command line.
- Send the following commands one by one.
- After each spindle command, check whether the simulator display changes.
M6 T3
M3 S12000
M4 S24000
M6 T3selects the RS485 / VFD test tool.M3 S12000starts spindle forward at 12000 RPM. The simulator should show a value change.M4 S24000starts spindle reverse at 24000 RPM. The simulator should show another value change.
✓
Expected Results
- The USB-to-RS485 adapter connects to the simulator with default 9600 8N1 settings.
- After
M3 S12000, the simulator display changes. - After
M4 S24000, the simulator display changes again. - If there is no response, swap the A and B wires and test again.