7 PROFIBUS DP Extensions
Bit Position
Byte
7 6 5 4 3 2 1 0
Designation
0 Publisher_Addr
1 Sample_Length
2
:
246
Sample_Data
Figure 7-11: DXBout-Buffer
When reading the Next_DXBout_buffer_Cmd the user gets the information
which buffer ('U' buffer) is assigned to the user after the change, or whether
a change has taken place at all.
Bit Position
Address
7 6 5 4 3 2 1 0
Designation
12H F U N D DXBout_Buffer_SM
DXBout_Buffer_SM, Address 12H:
bit 7-6
F: Assignment of the F-Buffer
00 = Nil
01 = DXBout_Buf_Ptr1
10 = DXBout_Buf_Ptr2
11 = DXBout_Buf_Ptr3
bit 5-4
U: Assignment of the U-Buffer
00 = Nil
01 = DXBout_Buf_Ptr1
10 = DXBout_Buf_Ptr2
11 = DXBout_Buf_Ptr3
bit 3-2
N: Assignment of the N-Buffer
00 = Nil
01 = DXBout_Buf_Ptr1
10 = DXBout_Buf_Ptr2
11 = DXBout_Buf_Ptr3
bit 1-0
D: Assignment of the D-Buffer
00 = Nil
01 = DXBout_Buf_Ptr1
10 = DXBout_Buf_Ptr2
11 = DXBout_Buf_Ptr3
Figure 7-12: DXBout-Buffer Management
62 Revision 1.03
VPC3+C
User Manual
Copyright © profichip GmbH 2004-2006
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