Structure Of Profibus Output Data Word - Siemens SLE / SLE-DP – SIMOLINK-Encoder Betriebsanleitung

Start-Up
6.4.5

Structure of PROFIBUS output data word

15 14 13 12
U 0 0
Control Reserved
bit
6-16
02.2001
...
A I
= F
I
A
= F
A I
= F
A I
= F
L FW
T PQW
L PIW
T FW
BE
Fig. 6-9 SLE-DP; Sample program
The important program lines in the example are:
T PQW
Write output data word (address change and activation) as
word command and
L PIW
Read input data word (status and error bits) as word command.
The word transfer commands ensure that the 2-byte data are
processed consistently.
The PROFIBUS output data word (ODW) contains:
8 bits of read address, 3 bits of read channel and 1 bit of transfer
control
2-byte output data word
11 10 9
2 1
0 0 2 2
Receive channel
Fig. 6-10 SLE-DP; structure of PROFIBUS output data word
SLE / SLE-DP – SIMOLINK Encoder
0.4
0.0
0.5
0.1
0.6
0.2
0.7
0.7
0
256
256
2
256
256
8 7 6
0 7 6
2 2 2 2
GWE-477 763 4070.76 J
Operating Instructions
5 4 3 2
5 4 3 3
2 2 2
Receive address
Siemens AG
SIMOVERT MASTERDRIVES
1 0
1 0
2 2