Patent ID: 8032257

Claim:
A field equipment of two-wire system that calculates a process quantity based on a signal related to the process quantity, the field equipment comprising: a signal processing section for processing the signal related to the process quantity; a first calculation control section for generating a first control signal which controls a start of a signal processing of the signal processing section; first and second insulating sections coupled to the first calculation control section; and a second calculation control section coupled to the first and second insulating sections and the signal processing section, the second calculation control section receiving the first control signal and then transmitting a second control signal corresponding to the first control signal to the signal processing section, wherein the signal processing section generates a processed signal based on the second control signal, and the second calculation control section receives the processed signal, then transmits data related to the processed signal to the first calculation control section via the second insulating section, and then shifts to a low power consumption mode.