Using PID_3Step
5.2 PID_3Step V2
PID control
Function Manual, 03/2017, A5E35300227-AC
117
Control mode V2
Physical quantity
Select the physical quantity and unit of measurement for setpoint, process value, and
disturbance variable in the "Controller type" group. Setpoint, process value, and disturbance
variable is displayed in this unit of measurement.
An increase of the output value is generally intended to cause an increase in the process
value. This is referred to as a normal control logic.
PID_3Step does not work with negative proportional gain. Select the check box "Invert
control logic" to reduce the process value with a higher output value.
Examples
● Opening the drain valve will reduce the level of a container's contents.
● Increasing cooling will reduce the temperature.
1. To switch to "Inactive" mode after CPU restart, clear the "Activate Mode after CPU
restart" check box.
To switch to the operating mode saved in the Mode parameter after CPU restart, select
the "Activate Mode after CPU restart" check box.
2. In the "Set Mode to" drop-down list, select the mode that is to be enabled after a
complete download to the device.
After a complete download to the device, PID_3Step starts in the selected operating
mode. With each additional restart, PID_3Step starts in the mode that was last saved in
Mode.
Example
You have selected the "Activate Mode after CPU restart" check box and the entry
"Pretuning" in the "Set Mode to" list. After a complete download to the device, PID_3Step
starts in the "Pretuning" mode. If pretuning is still active, PID_3Step starts in "Pretuning"
mode again after restart of the CPU. If pretuning was successfully completed and automatic
mode is active, PID_3Step starts in "Automatic mode" after restart of the CPU.
To Next Page
Loading...
Need help?
General
