Appendix; Mailbox 2.0 Transmission Method; Message; Figure 55: Communication Via Mailbox 2.0 - WAGO 750-632 Manual

106 Appendix

11 Appendix
11.1

Mailbox 2.0 Transmission Method

Mailbox 2.0 defines a service to transfer data full-duplex via a defined channel.

Figure 55: 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.
11.1.1

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:
Message with extended header:
Structure of the simple header:

Figure 56: Simple Header (Structure)

Manual
Version 1.3.1, valid from FW/HW-Version 01/01
WAGO I/O System 750/753
750-632 Proportional Valve Module