Network-field interface for manufacturing systems

Details Network-field interface for manufacturing systems Network-field interface for manufacturing systems

G - Physics

06

F

354/236

G06F 13/00 (2006.01) G05B 19/418 (2006.01)

Patent

CA 2038919

ABSTRACT A network-field interface, termed an NFI (12) is intended for digitally interfacing at least one host computer (14) on a network (10) to at least one field device (11). The network (10) operates with a predetermined communications protocol including READ and WRITE services. The NFI comp- rises I/O ports (22,24) for connection to the field de- vices, a modem (55,Fig.5) to facilitate communication between the network and the interface, a CPU (51,Fig.5), volatile and non-volatile memory (52,53,Fig.5) accessible to both the modem and the CPU, and program modules resident in the memory. The program modules are executable by the CPU to map the READ and WRITE services of the network onto the NFI's I/O ports. In this way the host computer is able to READ and WRITE directly to the I/O ports through the modem. (FIGS. 1,2,5)

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