User Data Interface "Receive" Automation System >>> Vs120 Processing Unit; Programming Data Fragmentation - Siemens SIMATIC VS120 Operating Instructions Manual

Process interfacing over an automation system (PLC, PC)
10.4 Control over PROFIBUS DP and PROFINET IO
10.4.2.4 User data interface "Receive" automation system >>> VS120 processing unit
Byte no.
0
1
2
3
4
5
6 to 9
10 to 31
Delay time is the delay of the trigger signal by the specified time.
*)
10.4.3

Programming data fragmentation

Note
You require a handshake procedure if you use a controller with a S7-CPU and the FB1
function block.
Handshaking
The following section introduces the handshake mechanism that ensures the consistency of
all the data sent from the processing unit to the PROFIBUS DP master or PROFINETI/O
controller regardless of any configured PROFIBUS DP or PROFINET IO consistency
mechanisms. This mechanism must be used with every transfer, even if only one block of
data is transferred.
Note
With handshakes, the data transfer must be constant at 32 bytes (inputs and outputs).
10-14
Data type Meaning
BYTE Reserved
BYTE Consecutive number of the data packet received from the DP master
BYTE Reserved
BYTE Reserved
BYTE Reserved
BYTE Reserved
DINT Delay time for hardware trigger delay
BYTE Reserved
*)
Vision Sensor SIMATIC VS120
Operating Instructions, Edition 02/2006, A5E00757507-01