PID controlling meter

• US 4,580,208 A
• Filed: 07/01/1983
• Issued: 04/01/1986
• Est. Priority Date: 07/05/1982
• Status: Expired due to Fees

• Current Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Original Assignee: Omron Tateisi Electronics Co. (Omron Corporation)
• Inventors: Nagao, Toshiaki, Sukimoto, Yasuyuki
• Primary Examiner(s): RUGGIERO, JOSEPH F
• Application Number:
  US06/510,250
• Time in Patent Office: 1,005 Days
• Field of Search: 364/160, 364/161, 364/162, 364/157, 364/188, 364/189, 318/609, 318/610, 318/561
• US Class Current: 700/42
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 5/01 electric
• CPC Class Codes: G05B 7/02 electric
• CPC Class Codes: G05D 23/1917 using digital means
• CPC Class Codes: G05D 23/22 the sensing element being a thermocouple

Abstract

A PID controlling meter is provided with unit for displaying an amount of operation representing the sum total of the bias constant and the operation result of three terms, i.e., a proportional term, an integrating term and differentiating term each of which is a function of deviation. The meter also has a constant setting unit for setting displayed amount of operation as a control parameter; unit for displaying set values of the constant setting a unit; a unit for reading the set values of the constant setting unit when a power source is closed; and a unit for determining bias constant when the power source is closed on the basis of the constant set values read by the reading unit.

Claims

1. A PID controlling meter comprising (a) means for displaying an amount of operation comprising a sum of a first bias constant and an operation result of three terms, said three terms being a proportional term, an integrating term and a differentiating term each being a function of deviation;

(b) a second constant setting unit;

(c) means for displaying set values of said second constant setting unit;

(d) means for reading set values of said second constant setting unit when a power source is closed; and

(e) means for setting said bias constant based on set values read by said reading means, wherein a unit of set values of said second constant setting unit is the same as a unit of numerals displayed by said means for displaying an amount of operation.

2. The PID controlling meter according to claim 1 wherein said second constant setting unit comprises an analog amount setting unit.

3. The PID controlling meter according to claim 1 wherein said second constant setting unit comprises a digital amount setting unit.