Modbus Slave Execution Error
Schneider Electric · Altistart 22 Soft Starter
What does 4 mean?
The Modbus slave device started but could not complete the requested operation. This can occur due to the slave being busy, encountering an internal processing error, or hitting a resource limitation. This prevents the requested action from completing, leading to an incomplete operation or data acquisition.
Complete Troubleshooting Guide
- 1
Reduce the frequency or complexity of Modbus requests if the slave device is heavily loaded.
- 2
Check the slave device's internal logs or status indicators for specific error messages that might provide more detail.
- 3
Ensure the slave device's processing resources (CPU, memory) are not overutilized by other tasks.
- 4
Consider applying firmware updates to the slave device if known bugs related to execution errors exist.