Profichip VPC3+S - Page 65

PROFIBUS DP Extensions 7
VPC3+S User Manual
Revision 1.04
65
Copyright © profichip GmbH, 2012
Subscriber
A Subscriber requires information about the links to its Publishers. These
settings are contained in a DXB Linktable or DXB Subscribertable and
transferred via the Structured_Prm_Data in a Set_Prm or Set_Ext_Prm
telegram. Each Structured_Prm_Data is treated like the User_Prm_Data
and therefore to be evaluated by the user. From the received data the user
has to generate DXB_Link_Buf and DXB_Status_Buf entries. The watch-
dog must be enabled to make use of the monitoring mechanism. The user
must check this.
Byte
Bit Position
Designation
7
6
5
4
3
2
1
0
0
Structured_Length
1
0
0
0
0
0
0
1
1
Structure_Type
2
0
0
0
0
0
0
0
0
Slot_Number
3
0
0
0
0
0
0
0
0
Reserved
4
0
0
0
0
0
0
0
1
Version
5
Publisher_Addr
6
Publisher_Length
7
Sample_Offset
8
Sample_Length
9
:
120
further link entries
Figure 7-8: Format of the Structured_Prm_Data with DXB Linktable
(specific link is grey scaled)