Table 87 Structure Of The Aoe Data Area For An Isdu Read Request (Aoe Read Request); Table 88 Structure Of The Indexoffset In The Aoe Data Area For An Isdu Read Request (Aoe Read Request) - WAGO 765-1205/100-000 Product Manual

Appendix
The procedure is as follows:
• The EtherCAT master uses the AoE Read command and writes the ISDU read request
into the AoE mailbox header, indicating the index and subindex. This information ad-
dresses the port and the object of the IO-Link device.
• After the IO-Link device has sent the IO-Link master the response to the ISDU read re-
quest, the EtherCAT slave sends the AoE response to the EtherCAT master.
The following figure shows the process of reading to an IO-Link device with the AoE
Read command:
(1) AoE Read Request: Packet Structure for an ISDU Read Request
Addressing is done in AoE via:
• AoE port number (in AoE header)
• IndexGroup (in the AoE data area)
• IndexOffset (in the AoE data area)
The structure of the AoE mailbox frame for transferring the ISDU read request (number
(1) in figure "ISDU Read Process (EtherCAT)") is as follows:
1. The structure of the AoE mailbox frame corresponds to the description in
view of the Structure of the AoE Frame
2. The AoE header corresponds to the description in
the AoE Frame
3. The AoE data area has the following structure for an ISDU read request:
Offset
0
4
8
The data is stored in Index Offset as follows:
Table 88: Structure of the IndexOffset in the AoE Data Area for an ISDU Read Request (AoE Read Request)
Offset
4
6
7
118 Product manual | Version: 2.0.0
8DIO FLD EC DC 24V 2.0A
[} 116].
Table 87: Structure of the AoE Data Area for an ISDU Read Request (AoE Read Request)
Parametername Type
IndexGroup Unsigned32
IndexOffset Unsigned32
Length Unsigned32
Parametername Type
(IO-Link index) Unsigned16
– Unsigned8
(IO-Link subindex) Unsigned8
Figure 41: ISDU Read Process (EtherCAT)
[} 116].
8 Overview of the Structure of
Value Description
0xF302 IndexGroup of the data to be read (fixed
value).
see below IndexOffset of the data to be read. Contains
index and subindex of the IO-Link object.
Structured according to the following table.
– Length of the data to be read (in bytes)
Value Description
0x0000 ... Object index of the IO-Link device to be
0x7FFF read from.
0x00 Fixed value
[0x00...0x Object subindex of the IO-Link device to be
FF] read from.
765-1205/100-000
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