Twin PID Loops Give Drives More Control Options

Two PID (proportional integral derivative) controllers, feature in the latest ABB drives, making it easier and less expensive to set up control loops to manage industrial processes. The ABB drive contains two independent PID loops, which can be selected from digital inputs. The addition of the two loops means that instead of simply controlling the speed of the motor, the drive can command the motor to run at a speed that will allow the user…