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

Write Service (SDO Download)

Initiate SDO Download Protocol

This protocol is used to implement the Initiate SDO Download
service.
Client
0
Request
Confirm
ccs Client command specifier; ccs = 1: Initiate download request.
scs Server command specifier; scs = 3: Initiate 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. The
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. The value is always 0.
Reserved Reserved for further use. The value is always 0.
Initiate SDO Download Protocol
7...5 4 3...2
ccs = 1 x n
0
7...5 4...0
scs = 3 x
1 4
1 0
m
e s
1 4
m Reserved
Server
8
d
Indication
8
Response
Communication
107