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Communication
79
User Specific Record Data
User Specific Record Data can be used for global parameter
access. This index is supported for compatibility reasons.
Header and frame structures
PROFINET IO uses DCE RPC (Distributed Computing
Environment Remote Procedure Call) protocol for acyclic read
and acyclic write services. IO controllers and supervisors will take
care of formulating most of the request frames. However, it is
possible that handling the PROFIdrive request and response
headers must be performed in the application logic. The acyclic
frame structure, headers and error codes are described further
below.
Table 13.Ethernet frame structure
Dest addr.
and the
Src addr.
are the destination and the source
of the communication relationship. The addresses are in
hexadecimal format, e.g. 00-30-11-02-57-AD.
Ether type
is 0x800 for non-real-time communication.
IP
and
UDP
fields contain the IP address of the source and the
destination as well as the communication ports and length of the
message.
RPC
contains for example the
read
or
write
service ID, interface
description and selected objects.
NDR
request block describes the length of the following data
block. The response block also contains bytes
ErrorCode
,
ErrorDecode
,
ErrorCode1
and
ErrorCode2
for presenting the
status of the request.
Frames
Dest
addr.
Src
addr.
Ether
type
IP
UDP
RPC
NDR
Read or
Write
Data
Bytes
6
6
2
28
80
20
64
...
Содержание RETA-02
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Страница 6: ...Safety instructions 6 ...
Страница 10: ...Table of contents 10 ...
Страница 14: ...Introduction 14 ...
Страница 30: ...Mechanical installation 30 ...
Страница 32: ...Electrical installation 32 ...
Страница 42: ...Drive configuration 42 ...
Страница 48: ...Network configuration 48 ...
Страница 50: ...Master configuration 50 ...
Страница 58: ...Communication profiles 58 11 to 15 Drive specific Bit Name Value STATE Description ...
Страница 68: ...Communication profiles 68 ...
Страница 106: ...Diagnostics 106 ...
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