Closed loop and/or open loop control method for an electropneumatic field device
AssigneeSamson Aktiengesellschaft
InventorDavid Wagner-Stuerz
Life of this patent
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Abstract
In a closed loop control method for an electropneumatic field device, an electronic target value input of a command variable corresponding to a target value of a control center is received by the open loop and/or closed loop control electronics, an electronic output for a manipulating variable to pilot the electropneumatic converter is generated by the open loop and/or closed loop control electronics; and, in a predetermined operating condition of the field device, the manipulating variable is determined by a closed loop control algorithm based on the command variable and on another controlled variable different from an actual control member position measurement value.
Claims15
A closed loop control method for an electropneumatic field device including a pneumatic actuating drive configured to operate a control member, an electropneumatic converter configured to generate a pneumatic manipulating variable signal for the pneumatic actuating drive, and open loop and/or closed loop control electronics, the method comprising:
- receiving, by the open loop and/or closed loop control electronics, an electronic target value input of a command variable corresponding to a target value of a control center;
- generating, by the open loop and/or closed loop control electronics, an electronic output for a manipulating variable to pilot the electropneumatic converter;
- and
- in a predetermined operating condition of the field device, determining the manipulating variable by a closed loop control algorithm based on the command variable and on another controlled variable different from an actual control member position measurement value.
An open loop control method for an electropneumatic field device including a pneumatic actuating drive configured to operate a control member, an electropneumatic converter configured to generate a pneumatic manipulating variable signal for the pneumatic actuating drive, and open loop and/or closed loop control electronics, the method comprising:
- receiving, by the open loop and/or closed loop control electronics, an electronic target value input for a command variable corresponding to a target value of a control center;
- generating, by the open loop and/or closed loop control electronics, an electronic output for a manipulating variable to pilot the electropneumatic converter;
- in a predetermined operating condition of the field device, determining the manipulating variable by an open loop control algorithm based on the command variable and on a predetermined reference value, and
- dependent upon a comparison of the command variable to the reference value, attributing one of a plurality of predetermined manipulating variable values to the manipulating variable.
Dependencies are inferred from the claim text.