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Appendix
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Product manual | Version: 2.0.0
8DIO FLD EC DC 24V 2.0A
The response has the following structure:
Table 90: Structure of the AoE Data Area (AoE Read Response in Case of Error)
Offset
Parametername
Type
Value
Description
0
Result
Unsigned32
Value not
equal to 0
Contains the ADS error number
4
Length
Unsigned32
0
Length of the data that has been read
(0 bytes)
14.1.5 ISDU Write Service
Parameter data is written to an object of an IO-Link device via the AoE mailbox protocol
and IO-Link ISDU services.
The procedure is as follows:
• The EtherCAT master uses the AoE write command and writes the ISDU write 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 write re-
quest, the EtherCAT slave sends the AoE response to the EtherCAT master.
The following figure shows the process of writing to an IO-Link device using the AoE
Write command:
Figure 43: ISDU Write Process (EtherCAT)
(1) AoE Write Request: Packet Structure for an ISDU Write 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 the transmission of the ISDU write request
(number (1) in figure “ISDU Write Process(EtherCAT)”) is as follows:
• The structure of the AoE mailbox frame corresponds to the description in
8
of the Structure of the AoE Frame [
• The AoE header corresponds to the description in
8
• The AoE data area has the following structure for an ISDU write request:
Table 91: Structure of the AoE Data Area for an ISDU Write Request (AoE Write Request)
Offset
Parametername
Type
Value
Description
0
IndexGroup
Unsigned32
0xF302
IndexGroup of the data to be written (fixed
value).