Error Limit

Modbus Motion Interface



Error Limit is used to describe how far a physical axis's Actual Position can lag behind the Commanded Position without that lagging being considered an error. In the ideal case the motor's Actual Position exactly follows the Commanded Position but system dynamics and transient response of the motion control law often make this goal impossible. However, the error can be minimized for profiles without acceleration. Systems which undergo high acceleration and deceleration are likely to incur hysteresis if the power system saturates. If the difference between the Actual Position and Commanded Positions exceeds the Error Limit that was set, the axis will perform a Motor Off.


The Set Error Limit register does not produce any escapes.


This command sets the error limit to 1 percent of the user units being used:


This command reads the current error limit setting:


Related Topics

Error Limit
Actual Position
Commanded Position