Modbus Slave Execution Error

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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure the slave device's processing resources (CPU, memory) are not overutilized by other tasks.

2. 4

   Consider applying firmware updates to the slave device if known bugs related to execution errors exist.