| http://www.w3.org/ns/prov#value | - BACKGROUND OF THE INVENTION [0001] This invention relates to sensors, controllers and sensor systems including such sensors and controllers. [0002] For effecting controls of different kinds, say, in an FA system, it has been known to connect sensors to a PLC, to transmit control commands to a target apparatus intended to be controlled by the PLC and to thereby effect controls such as coordination
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