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Appendix
Product manual | Version: 2.0.0
119
8DIO FLD EC DC 24V 2.0A
The following figure shows the structure of the AoE header area and AoE data area of the
ISDU read service.
Figure 42: Structure of the AoE Header Area and AoE Data Area in the ISDU Read Service
(2) AoE Read Response: Response of the ISDU Read Service
The EtherCAT master receives the AoE read response (number (2) in figure “ISDU Read
Process (EtherCAT)”).
• If the
Result
parameter in the AoE data area of the response packet is equal to 0, then
the response of the ISDU read service has been read.
• If the
Result
parameter in the AoE data area of the response packet is not equal to 0,
then an error has occurred, and the operation was unsuccessful.
AoE Read Response: Structure of the AoE Data Area (in Case of Success: ADS
Return Code Equals 0)
If the
Result
parameter (offset 0) in the AoE data area of the response packet has the
value 0, then the ISDU read request has been executed, and the user data is located in
the
Data
parameter (starting at offset 8).
The response has the following structure:
Table 89: Structure of the AoE Data Area (AoE Read Response in Case of Success)
Offset
Parametername
Type
Value
Description
0
Result
Unsigned32
0 (corre-
sponds to
ERR_
NOER-
ROR)
Contains the ADS error number
4
Length
Unsigned32
(Corre-
sponds to
the re-
quest)
Length of the data that has been read (in
bytes)
8
Data
Unsigned32 [Length] (Data-de-
pendent)
The data that has been read
AoE Read Response: Structure of the AoE Data Area (in Case of Error: ADS Return
Code Not Equal to 0)
If the Result parameter (offset 0) in the AoE data area of the response packet has a value
not equal to 0 (ERR_NOERROR), then the ISDU read request could not be executed.
The
Result
parameter contains the error number.
