BONFIGLIOLI Vectron Active Cube User Manual

11.3.4 Segmented Transfer
For data lengths > 4 Bytes the so called Segmented Transfer is used – the expedited
Transfer only supports lengths up to 4 Bytes.
In the first “Initiate” Telegram the overall amount of used data of the following s
e-
quence telegrams is defined.
In the following telegrams 7 data byes per telegram
are send until the amount of data
bytes to be transmitted was reached
. The sequences of the Segmented Transfer are
separated by a toggle bit in the command specifier for the request and the reply tel
e-
gram. A “Continue” Bit marks the last telegram.
11.3.4.1 Reading „Segmented Transfer“
When Reading a regular Read access via command specifier 0x40 is executed. The
response contains the command specifier 0x41 that marks the requirement of Se
g-
mented Transfer for this object. The following requests alternate with command spe
c-
ifiers 0x60 and
0x70 until all data bytes were transmitted. In the last segment the
command specifier (bits 1…3) contains the amount of not used data bytes in that last
segment.
The resulting request and response telegrams are shown in the following sequence.
The Command Specifier have the following setup:
Initiate Upload Command Specifier:
Request:
Bit
7
6
5
4
3
2
1
0
ccs
0
0
0
0
0
Response:
Bit
7
6
5
4
3
2
1
0
scs
0
n
e
s
Segment Upload Command Specifier:
Request:
Bit
7
6
5
4
3
2
1
0
ccs
t
0
0
0
0
Response:
Bit
7
6
5
4
3
2
1
0
scs
t
n
c
Abbreviation
Description
Values
ccs
Client command Specifier
2 = Initiate upload request
3 = Upload segment request
scs
Server command Specifier
2 = Initiate upload response
0 = Upload segment response
n
Only valid if e =1 AND s = 1,
in all other cases n = 0.
If valid: Amount of data bytes, that con-
tain no useful data
e
Transfer type
0 = Normal (Segmented) Transfer
1 = Expedited Transfer (see chapter
11.3.1)
s
Size indicator
0 = Data frame size is displayed
1 = Data frame size is not displayed
t
Toggle bit, toggled with each
Segment change
0 = First and odd segments
1 = Second and even segments
c
Continue bit, marks following
segments
0 = Further segments follow.
1 = This was the last segment.
34 CM-CAN ACU 04/13

BONFIGLIOLI Vectron Active Cube Specifications

General

Brand	BONFIGLIOLI
Model	Vectron Active Cube
Category	DC Drives
Language	English