Acyclic Messaging; Overview; Message Structure - Balluff BNI CCL-502-100-Z001 Betriebsanleitung

Balluff Network Interface – CC-Link – BNI CCL-502-100-Z001
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Acyclic messaging

6.1. Overview

6.2. Message
structure
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Acyclic messaging is used to reach special data of the BNI CCL-502-100-Z001 module and
the connected IO-Link devices. These special function data areas are organized by using so
access area.
The following access areas are supported by the BNI CCL-502-100-Z001:
Access area
Module info
IO-Link channel settings
IO-Link channel data: ISDU and event data
For messaging, some data area of the CC-Link communication area is reserved, called
"Message transmission area". Message block structure is like the following:
Read Request
Block Number L
Subcommand Type H
Division number L
Data size H
Request data
Sum check
Read Response
Block Number L
Subcommand Type H
L
Return status
H
Division number L
Data size H
Response data
Sum check
Write Request
Block Number L
Subcommand Type H
Division number L
Data size H
Request data
Sum check
Write Response
Block Number L
Subcommand Type H
L
Return status
H
Division number L
Data size H
Response data
Sum check
Access code(s)
0x10
0x20...0x23
0x30...0x31
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