Analysis of PDO messages for integrated motors in RS485 bus communication
LMS_ZYchao2025-11-1220 views
I. Instructions and Precautions
(1) Document Description: This document provides an example analysis of the PDO message of a 485 motor.
(2) Precautions: This example uses our company's stepper servo/servo/brushless 485 motor. Actual specifications may vary.
II. Example
The following is an example of the default PDO configuration in the NiMStudio console:
The captured request message is shown below:
Analysis:
1. Number of registers
2. Number of registers * 2
3. Motor address (occupies one register)
4. H03C2 (Mode) Number of registers: 1
5. H0380 (Control Word) Number of registers: 1
6. H03E7 (Target Position) Number of registers: 2
7. H0382 (Target Speed in VM Mode) Number of registers: 1
8. H03DB (Target Torque) Number of registers: 1
9. CRC Checksum
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