Mailbox 2.0 Transmission Method; Message; Figure 30: Communication Via Mailbox 2.0 - WAGO MOVILINK SPEEDWAY 767 Manual

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12.2

Mailbox 2.0 Transmission Method

Mailbox 2.0 defines a service to transfer data full-duplex via a defined channel.
Sender
Transmit data
Application A
Receive data

Figure 30: Communication via Mailbox 2.0

Example:
A sender wants to transfer 10 bytes (the character string "Hello Wago") to a
receiver via a 4-byte wide channel.
12.2.1

Message

The Mailbox 2.0 method packages the data in messages. A message contains a
header and user data.
There are two message types.
Message with simple header:
xx "H" "a" "I"
Message with extended header:
xx xx
Communication
(via Mailbox 2.0)
"I" "o"
xx "H" "a" "I"
767-5204 MOVILINK® Interface (RS-232, RS-485)
Channel
Transparent
" " "W" "a" "g" "o"
"I" "o" " " "W" "a" "g" "o"
WAGO-SPEEDWAY 767
Receiver
Receive data
Application B
Transmit data
Manual
Version 1.1.0