JPH0267402U - - Google Patents

Description

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a block diagram of a process controller, FIG. 2 is a flowchart for explaining the operation of the process controller shown in FIG. 1, and FIG. The figure is a characteristic diagram showing changes in the control amount over time. Further, FIG. 4 is a characteristic diagram showing changes over time in the controlled variable in a conventional process regulator. DESCRIPTION OF SYMBOLS 1... Process controller, 2... Setting section, 6... Arithmetic control section, 10... ARW section, 12... Re-initialization section.

Claims (1)

[Scope of Claim for Utility Model Registration] A setting section for setting a proportionality constant, an integral constant, a set value serving as a control target for an external control device, etc., and whether or not the detected amount from the control device is within the proportional band. an ARW unit that outputs an ARW value to an arithmetic control unit when the detected amount reaches a proportional band;
A process controller comprising: an arithmetic control unit that calculates an operation amount for the control device by proportional P and integral I operations based on the detected amount, set value, and ARW value, the setting included in the proportional band; It is determined whether the detected amount has reached the lower limit of a predetermined temperature zone (hereinafter referred to as a settling zone) set near the temperature value, and when the detected amount reaches the settling zone, the detected amount falls within the proportional band. What is claimed is: 1. A process regulator comprising: a reinitialization unit that outputs a signal for initializing an integral value from 1 to a settling zone and resetting an ARW value.