Modbus Motion Interface
Error Position returns the difference between where the motor is commanded to be and its Actual Position. For a stepper motor the Actual Position
is the number of counts that have been transmitted to the drive section so the Error Position is reporting how well the electronics is expressing
the trajectory. For a servo motor the Actual Position is the motor shaft position as reported by the encoder. In this case the Error Position reports how well the motor
is physically tracking the trajectory. The Error Position is monitored and if it is found to be greater than the Error Limit, the motor is turned off.
The Error Limit can be changed with the Set Error Limit block.
Reading the Error Position register does not produce any escapes.
This statement reads the current error position for axis 1.