ABB +N5600 Firmware Instructions page 104

104 Program features
Quick configuration of the process PID controller
1. Activate the process PID controller (parameter
2. Select a feedback source (parameters 40.08...40.11).
3. Select a setpoint source (parameters 40.16...40.25).
4. Set the gain, integration time, derivation time, and the PID output levels
Set 1 gain, 40.33 Set 1 integration
output min and
5. The PID controller output is shown by parameter
actual. Select it as the source of, for example,
Sleep function for process PID control
The sleep function can be used in PID control applications that involve relatively long
periods of low demand (for example, a tank is at level), During such periods, the
sleep function saves energy by stopping the motor completely, instead of running the
motor slowly below the efficient operating range of the system. When the feedback
changes, the PID controller wakes the drive up.
Example: The drive controls a pressure boost pump. The water consumption falls at
night. As a consequence, the process PID controller decreases the motor speed.
However, due to natural losses in the pipes and the low efficiency of the centrifugal
pump at low speeds, the motor would never stop rotating. The sleep function detects
the slow rotation and stops unnecessary pumping after the sleep delay has passed.
The drive shifts into sleep mode, still monitoring the pressure. The pumping resumes
when the pressure falls under the wake-up level (setpoint - wake-up deviation) and
the wake-up delay has passed.
40.37 Set 1 output
40.07 Set 1 PID operation
time, 40.34 Set 1 derivation
max).
40.01 Process PID output
22.11 Speed ref1
mode).
(40.32
time, 40.36 Set 1
source.