US 5,490,058 A · Modulating controller for controlling two operation terminals · patentgrep

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Abstract

This invention relates to a modulating controller for controlling two operation terminals, and more particularly to a device to suppress disturbance to a process when a control signal is switched or when a bias is set. This invention, in a modulating controller to control a process amount by the total of two operation terminals disposed in parallel, when either of two H/A station devices outputs a manual operation value, provides a device which outputs a value obtained by reducing the manual operation value from the control amount of the process amount to be controlled by the total of two operation terminals as the control operation signal to the other H/A station device and prepares a value almost same with the operation terminal control signal outputted by one H/A station device as the control operation signal for one H/A station device. And, this invention automatically controls the process amount by either of the two operation terminals disposed in parallel, and in the modulating controller making one side as the backup, one operation terminal control signal is always tracked to the control operation device when both operation terminals are manually operated. When switching the other operation terminal to the automatic operation, timing to switch the other operation terminal to the automatic operation and timing to release tracking are delayed. During which a device to switch the tracking signal to the output of the other operation terminal is disposed.

Claims10

Dependent claims

A modulating controller for controlling a process amount by controlling first and second operation terminals disposed in parallel comprising:

sensing means for detecting the process amount;
difference operation means for providing a difference signal representing a difference between the process amount detected by said sensing means and a process amount set signal;
control operation means for receiving the difference signal from said difference operation means and for outputting a first control operation signal;
signal generating means for generating a second control operation signal;
first signal switching means, corresponding to said first operation terminal, for receiving and switching between outputting a first adding result signal and the second control operation signal, and for outputting a first operation terminal control signal to said first operation terminal;
second signal switching means, corresponding to said second operation terminal, for receiving and switching between outputting a second adding result signal and the second control operation signal, and for outputting a second operation terminal control signal to said second operation terminal;
first difference operation means for providing as a first difference signal a difference between said first control operation signal and the second operation terminal control signal outputted by the second signal switching means;
second difference operation means for providing as a second difference signal a difference between said first control operation signal and the first operation terminal control signal outputted by the first signal switching means;
adjusting means for outputting said second difference signal unchanged and for retaining the second difference signal when either of said first and second signal switching means outputs the second control operation signal, and for outputting a signal shifting toward zero from a value of the retained signal when said one of the first and second signal switching means outputting the second control operation signal switches to output said first or second adding result signal;
first addition means for adding said first difference signal and said first control operation signal and for outputting the first adding result signal to said first signal switching means;
and
second addition means for adding the output of said adjusting means and said first control operation signal and for outputting the second adding result signal to said second signal switching means.

9 more elements

A modulating controller for controlling a process amount by controlling first and second operation terminals disposed in parallel comprising:

sensing means for detecting the process amount;
difference operation means for providing a difference signal representing a difference between the process amount detected by said sensing means and a process amount set signal;
control operation means for receiving the difference signal from said difference operation means and for outputting a first control operation signal;
signal generating means for generating a second control operation signal;
first signal switching means, corresponding to said first operation terminal, for receiving and switching between outputting a first adding result signal and the second control operation signal, and for outputting a first operation terminal control signal to said first operation terminal;
second signal switching means, corresponding to said second operation terminal, for receiving and switching between outputting a second adding result signal and the second control operation signal, and for outputting a second operation terminal control signal to said second operation terminal;
first difference operation means for providing as a first difference signal a difference between said first control operation signal and the second operation terminal control signal outputted by the second signal switching means;
second difference operation means for providing as a second difference signal a difference between said first control operation signal and the first operation terminal control signal outputted by the first signal switching means;
adjusting means for outputting said second difference signal unchanged and for tracking the second difference signal when either of said first and second signal switching means outputs the second control operation signal, and for outputting a signal shifting toward zero from a value of said second difference signal when said one of the first and second signal switching means outputting the second control operation signal switches to output said first or second adding result signal;
first addition means for adding said first difference signal and said first control operation signal and for outputting the first adding result to said first signal switching means;
and
second addition means for adding the output of said adjusting means and said first control operation signal and for outputting the second adding result to said second signal switching means.

9 more elements

A modulating controller for controlling a process amount by controlling first and second operation terminals disposed in parallel comprising:

sensing means for detecting the process amount;
difference operation means for providing a difference signal representing a difference between the process amount detected by said sensing means and a process amount set signal;
control operation means for receiving the difference signal from said difference operation means and for outputting a first control operation signal;
signal generating means for generating a second control operation signal;
first signal switching means, corresponding to said first operation terminal, for receiving and switching between outputting a first adding result signal and the second control operation signal, and for outputting a first operation terminal control signal to said first operation terminal;
second signal switching means, corresponding to said second operation terminal, for receiving and switching between outputting a second adding result signal and the second control operation signal, and for outputting a second operation terminal control signal to said second operation terminal;
first difference operation means for providing as a first difference signal a difference between said first control operation signal and the second operation terminal control signal outputted by the second signal switching means;
second difference operation means for providing as a second difference signal a difference between said first control operation signal and the first operation terminal control signal outputted by the first signal switching means;
bias setting means for setting a bias value;
adjusting means for outputting said second difference signal unchanged and for retaining the second difference signal when either of said first and second signal switching means outputs the second control operation signal, and for outputting a signal shifting toward said set bias value from the value of the retained signal when said one of the first and second signal switching means outputting the second control operation signal switches to output said first or second adding result signal;
first addition means for adding said first difference signal and said first control operation signal and for outputting the first adding result to said first signal switching means;
and
second addition means for adding the output of said adjusting means and said first control operation signal and for outputting the second adding result to said second signal switching means.

10 more elements

A modulating controller for controlling a process amount by controlling first and second operation terminals disposed in parallel comprising:

sensing means for detecting the process amount;
difference operation means for providing a difference signal representing a difference between the process amount detected by said sensing means and a process amount set signal;
control operation means for receiving the difference signal from said difference operation means and for outputting a first control operation signal;
signal generating means for generating a second control operation signal;
first signal switching means, corresponding to said first operation terminal, for receiving and switching between outputting a first adding result signal and the second control operation signal, and for outputting a first operation terminal control signal to said first operation terminal;
second signal switching means, corresponding to said second operation terminal, for receiving and switching between outputting a second adding result signal and the second control operation signal, and for outputting a second operation terminal control signal to said second operation terminal;
first difference operation means for providing as a first difference signal a difference between said first control operation signal and the second operation terminal control signal outputted by the second signal switching means;
second difference operation means for providing as a second difference signal a difference between said first control operation signal and the first operation terminal control signal outputted by the first signal switching means;
bias setting means for setting a bias value;
adjusting means for outputting said second difference signal unchanged and for tracking the second difference signal when either of said first and second signal switching means outputs the second control operation signal, and for outputting a signal shifting toward said set bias value from a value of said second difference signal when said one of the first and second signal switching means outputting the second control operation signal switches to output said first or second adding result signal;
first addition means for adding said first difference signal and said first control operation signal and for outputting the first adding result to said first signal switching means;
and
second addition means for adding the output of said adjusting means and said first control operation signal and for outputting the second adding result to said second signal switching means.

10 more elements

A modulating controller for controlling a process amount by controlling first and second operation terminals disposed in parallel comprising:

sensing means for detecting the process amount;
difference operation means for providing a difference signal representing a difference between the process amount detected by said sensing means and a process amount set signal;
control operation means for receiving the difference signal from said difference operation means and for outputting a first control operation signal;
signal generating means for generating a second control operation signal;
first signal switching means for switching between said first and second control operation signals and for outputting an operation terminal control signal to the first operation terminal and for switching from said second control operation signal to said first control operation signal by a signal for switching this operation terminal control signal to said first control operation signal;
second signal switching means for switching between said first and second control operation signals and for outputting an operation terminal control signal to the second operation terminal;
time lag means for outputting a signal to said second signal switching means a predetermined time after receiving the signal to switch the operation terminal control signal outputted by said second signal switching means to said first control operation signal;
third signal switching means for outputting a signal which is outputted by said first signal switching means and for outputting a signal which is outputted by said second signal switching means when receiving said signal not passing through said time lag means and switching the operation terminal control signal outputted by said second signal switching means to said first control operation signal;
and
tracking condition means for tracking the signal outputted by said third signal switching means to said control operation means when said signal to switch the operation terminal control signal outputted by said first signal switching means to said first control operation signal and said signal to switch the operation terminal control signal outputted by said second signal switching means to said first control operation signal outputted by said time lag means are not a signal to switch to said first control operation signal.

7 more elements

Dependencies are inferred from the claim text.