@techreport{dube-modbus-applproto-00, number = {draft-dube-modbus-applproto-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-dube-modbus-applproto/00/}, author = {Dennis Dube and Jacques Camerini}, title = {{MODBUS Application Protocol}}, pagetotal = 29, year = 2002, month = may, day = 8, abstract = {MODBUS is an application layer messaging protocol, positioned at level 7 of the OSI model. MODBUS provides client/server communication between devices connected on different types of buses or networks. MODBUS is a confirmed service protocol and offers many services specified by function codes. MODBUS function codes are elements of MODBUS Request/Reply PDUs. The objective of this document is to describe the function codes used within the framework of MODBUS/TCP transactions.}, }