End users require that fieldbus devices from multiple suppliers intero
perate on a single fieldbus without custom programming or special inte
rfaces. To meet this requirement fieldbus devices must be interoperabl
e at the physical interface to the fieldbus, within the communications
protocol, and at the user application within the device. This paper d
escribes a fieldbus solution that meets the user requirements for inte
roperability and functionality. Copyright (C) 1996 Elsevier Science Lt
d.