Fluid handling – Systems – Programmer or timer
Patent
1996-11-26
1998-12-15
Lee, Kevin
Fluid handling
Systems
Programmer or timer
F16K 5100
Patent
active
058486097
ABSTRACT:
A digital positioner is used to control and operate an AC electric valve actuator. A valve interface control program (ICP) provides a PC-based interface to the valve positioner or positioners. The ICP allows parameter modification, monitors alarm conditions, and provides a display of calibration data.
The positioner has a security code to prevent unauthorized access; adjustable independent valve open and close ramp times; electronic valve actuator travel limits; programmable setpoint direction; programmable signal split range; manually adjustable deadband and an auto-adjusting setting; and high positioner resolution.
The ICP can command the positioner to do the following: set the value of a specified parameter; read the value of a specified parameter; control the positioner setpoint from a remote computer; request the positioner to return the present status; read the byte value in a specified EEPROM location; set the value of a specified location in EEPROM memory; and select system operating mode.
REFERENCES:
patent: 5197328 (1993-03-01), Fitzgerald
patent: 5363874 (1994-11-01), Henszey et al.
patent: 5549137 (1996-08-01), Lenz et al.
patent: 5588636 (1996-12-01), Eichholz et al.
Operating Instruction Manual, Siemens Sipart PS 6DR3001-1N/E-2N/E.
Marchesseault Richard R.
Omidbakhsh Sohrab
Reiland Richard F.
Lee Kevin
Worcester Control Licenseco Inc.
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