SM-120B-C003 · Software integration¶
Overview and files · Mechanical integration
This exact model uses Modbus-RTU over RS-485, according to its supplied model documentation.
Model-specific control specifications¶
Official source · 2026-10-02
| Parameter | Manufacturer specification |
|---|---|
| Command signal | Bus Packet Communication RS485 |
| Protocol Type | Modbus-RTU |
| ID | 0-253 |
| Communication Speed | 38400bps ~ 1 Mbps |
| Running degree | 360° (when 0~4095) |
| Feedback | Load,Position,Speed,Input Voltage,Current,Temperature |
| Position Sensor Resolution | 12Bits Magnetic Coding(360° /4096 ） |
Consult the exact firmware memory table for register writes; the specification table does not replace it.
Select the matching protocol¶
Use a Modbus-RTU controller and the register table for this exact model and firmware. The SMS_STS application layer, packet layout, addresses, units and control modes must not be used for this model. Read the Modbus-RTU protocol guide.
Read first, then move¶
- Verify the supply, shared ground, connector pinout, RS-485 wiring and mechanical clearance with this model's documents.
- Connect one unloaded servo, keep torque disabled, and confirm its address and baud rate using the approved discovery procedure.
- Read only documented registers with a matching Modbus-RTU client. Record the firmware and register-table revision.
- Confirm units, limits and operating modes before writing any control registers. Enable torque only when it is safe to move.
Missing model information¶
Request the exact register table, connector drawing and model-tested example through the resource list. No hardware test was performed during this documentation import.