End of Curve Parameter Setup
The End of Curve Parameter settings for pump systems are used to detect leaks/breaks in the system which can cause damage if not detected and corrected promptly. End of Curve detection is based on the measurement of the feedback pressure and the speed of the motor. If there is a leak/break in the system, pressure will decrease and the pump will accelerate to try and increase the system pressure to the desired pressure. When the drive is running at maximum speed with a feedback signal less than a specified % (FA-26) of the set point pressure (expected pressure) for a specified time period (FA-27), a fault alarm is initiated (Err31).
This is used to detect low pressure at full speed or whether the PID signal is lost. Example:
- Set FA-26 = 97 %
- Set FA-27 = 15 sec
When it is detected that the PID feedback is less than 97% the expected feedback for time period exceeding 15 seconds, the Solar Drive will stop and display fault alarm Err31.
