SCHEMATIC GENERATOR FOR USE IN PROCESS CONTROL NETWORK HAVING DISTRIBUTED CONTROL FUNCTIONS

摘要

PPROBLEM TO BE SOLVED: To provide a schematic generator for use in a process control network, in which control functions are implemented by field devices interconnected at various and distributed locations on a bus. PSOLUTION: The schematic generator polls each of the field devices and retrieves information pertaining to the identify of the device, the identity of the control functions associated with the device, the manner in which the device communicates with other devices, with respect to each of the control functions associated with that device, the timing associated with the execution of each of the control functions of that device and the timing of the communication activities associated with each of the control functions of that device; analyses the retrieved data; and creates a maintenance schematic illustrating the physical layout of the field devices in the process control network, a control loop schematic illustrating the interconnections between functions within one or more of the devices that form a control loop, and a timing schematic illustrating the timing of or the amount of communications occurring on the bus. PCOPYRIGHT: (C)2009,JPO&INPIT