Write Service (Sdo Download); Initiate Sdo Download Protocol - ABB FCAN-01 User Manual

Write Service (SDO Download)

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Initiate SDO Download Protocol

This protocol is used to implement the Initiate SDO Download
service.
Client
0
7...5
Request
ccs = 1
Confirm
ccs Client command specifier; ccs = 1: Initiates the download
request.
scs Server command specifier; scs = 3: Initiates the download
response.
n Number of data bytes (in d) which do not contain data. Bytes
[8-n, 7] do not contain segment data. Valid only if e = 1 and s =
1 (otherwise n = 0).
e Transfer type; e = 0: Normal transfer. e = 1: Expedited transfer.
s Size indicator; s = 0: No data set size indication.
s = 1: Data set size indication.
m Multiplexor; represents the index/subindex of the data to be
transferred by the SDO.
d Data; e = 0, s = 0: Reserved for further use.
e = 0, s = 1: Contains the number of bytes to be downloaded.
Byte 4 contains the LSB and byte 7 contains the MSB.
e = 1, s = 1: Contains the data of length 4-n to be downloaded.
Encoding depends on the type of the data referenced by index
and subindex.
e = 1, s = 0: Contains unspecified number of bytes to be
downloaded.
x Not used. Value is always 0.
Reserved Reserved for further use. Value is always 0.
Initiate SDO Download Protocol
4 3...2 1
x n e
0 1
7...5 4...0
scs = 3 x
Communication protocol 127
1 4
0
m
s
4
m Reserved
Server
8
d
Indication
8
Response