72 Appendix WAGO-I/O-SYSTEM 750750-658 CAN GatewayManualVersion 1.2.0, valid from FW/HW-Version 01/01Pos : 93 /All e Seri en (Allgemei ne Module)/Ü berschriften/Ebene 1/Anhang - Übersc hrift 1 @ 4\mod_1239874070437_21.doc x @ 30560 @ 1 @ 110 AppendixPos : 94 /All e Seri en (Allgemei ne Module)/M ailboxkommuni kation/Ü bertragungs verfahren M ailbox 2.0 @ 12\mod_1332927950573_21.doc x @ 92512 @ 233434555545 @ 110.1 Mailbox 2.0 Transmission MethodMailbox 2.0 defines a service to transfer data full-duplex via a defined channel.Figure 38: Communication via Mailbox 2.0Example:A sender wants to transfer 10 bytes (the character string "Hello Wago") to areceiver via a 4-byte wide channel.10.1.1 MessageThe Mailbox 2.0 method packages the data in messages. A message contains aheader and user data.There are two message types.Message with simple header:xx "H" "a" "I" "I" "o" " " "W" "a" "g" "o"Message with extended header:xx xx xx "H" "a" "I" "I" "o" " " "W" "a" "g" "o"TransparentCommunication(via Mailbox 2.0)Transmit dataApplication AReceive dataReceive dataApplication BTransmit dataSender Channel Receiver
