文件名称：CIP通讯协议规范
文件大小：3.31MB
文件格式：DOC
更新时间：2017-07-04 06:11:09
CIP 通讯
Contents 3-1 Introduction........................................................................................................................................................ 3 3-2 Scope.................................................................................................................................................................. 3 3-3 CIP packets over TCP/IP ................................................................................................................................... 3 3-3.1 Unconnected messages .............................................................................................................................. 3 3-3.2 CIP transport class 0 and class 1 connections ............................................................................................ 5 3-3.2.1 CIP transport class 0 and class 1 packets ............................................................................................... 5 3-3.2.2 Behavior of class 0 and class 1 connections (informative) .................................................................... 5 3-3.3 CIP Transport class 2 and class 3 connections ........................................................................................... 6 3-3.4 CIP Transport classes 4 through 6 ............................................................................................................. 6 3-4 Connection Manager object ............................................................................................................................... 6 3-4.1 Connection parameters............................................................................................................................... 6 3-4.2 Connection type ......................................................................................................................................... 7 3-4.3 Priority ....................................................................................................................................................... 7 3-4.4 Trigger Type .............................................................................................................................................. 7 3-4.5 Connection size .......................................................................................................................................... 7 3-4.6 Connection request time-out ...................................................................................................................... 7 3-4.7 Connection path ......................................................................................................................................... 7 3-4.7.1 Network connection ID .......................................................................................................................... 8 3-4.8 Forward_open for CIP transport class 2 and class 3 connections ............................................................ 11 3-4.9 Forward_open for CIP transport class 0 and class 1 connections ............................................................ 11 3-4.9.1 General ................................................................................................................................................. 11 3-4.9.2 Mapping connections to IP multicast addresses ................................................................................... 11 3-4.9.3 Completing the multicast connection (informative) ............................................................................. 12 3-5 CIP transport class 0 and class 1 connected data ............................................................................................. 12 3-5.1 UDP datagrams ........................................................................................................................................ 12 3-5.2 CIP transport class 0 and class 1 packet ordering .................................................................................... 12 3-5.3 Screening incoming connected data ......................................................................................................... 13 3-6 IP multicast scoping and address allocation..................................................................................................... 13 3-6.1 Background (informative) ........................................................................................................................ 13 3-6.1.1 General ................................................................................................................................................. 13 3-6.1.2 Current scoping practices ..................................................................................................................... 14 3-6.1.3 Current address allocation practices..................................................................................................... 14 3-6.1.4 Evolving Internet standards.................................................................................................................. 14 3-6.2 Interim scoping strategy ........................................................................................................................... 15 3-6.3 Interim allocation strategy........................................................................................................................ 15