Configuration via SIMATIC Manager
CAN-CBM-DP
Software Manual Rev. 2.0
34
5.3.3.2 Read Bytes of the Communication Window
(command acknowledge and reception of data CAN -> Gateway -> PLC)
Bytes of the
Communication
Window
Contents
0
1
as long as no receive data are available ‘EEEE’ hex, otherwise
high byte of CAN identifier (identifier bits [15] 10...8)
low byte of CAN identifier (identifier bits 7...0)
2
3
with 11-bit CAN identifier byte 2 and 3 always ‘0’
with 29-bit CAN identifier
byte 2: identifier bits 28...24
byte 3: identifier bits 23...16
4
5
6
7
8
9
10
11
data byte 0
data byte 1
data byte 2
data byte 3
data byte 4
data byte 5
data byte 6
data byte 7
12
number of received data bytes
13
return of the PLC loop counter which has been transmitted to the gateway
via the last PROFIBUS telegram
14
return of the sub command
15
error code of the read function (not supported at the moment)
Table 5.3.2:
Read bytes of the Communication Window
