ProSoft Technology 5104-DNPS-PDPM - Manual (Page 22)

Configuration PDPM ♦ ProLinx Gateway
Protocol Manual PROFIBUS DP Master
Page 22 of 70 ProSoft Technology, Inc.
June 24, 2013
Parameter Data Structure
SPC3 evaluates the first seven data bytes (without user prm data), or the first
eight data bytes (with user prm data). The first seven bytes are specified
according to the standard. The eighth byte is used for SPC3-specific
communications. The additional bytes are available to the application.
Byte Bit Position Designation
7 6 5 4 3 2 1 0
0 Lock
Reg Unio
Req Sync
Req Free
Req WD
on Res Res Res Station status
1 WD_Fact_1
2 WD_Fact_2
3 MinTSDR
4 Ident_Number_High
5 Ident_Number_Low
6 Group_Ident
7 Spec_User_Prm_Byte
8 to
243 User_Prm_Data
Byte 7 Spec_User_Prm_Byte
Bit Name Significance Default State
0 Dis_Startbit The start bit monitoring in the
receiver is switched off with
this bit Dis_Startbit = 1,
That is, start bit monitoring is
switched off.
1 Dis_Stopbit Stop bit monitoring in the
receiver is switched off with
this bit Dis_Stopbit = 0
That is, stop bit monitoring is not
switched off.
2 WD_Base This bit specifies the time
base used to clock the
watchdog.
WD_Base = 0: time base 10
ms
WD_Base = 1: time base 1 ms WD_Base = 0
That is, the time base is 10 ms.
3 to 4 Res To be parameterized with 0 0
5 Publisher_Enable DXB-publisher-functionality of
the SPC3 is activated with this
bit Publisher_Enable = 0, DXB-
request-telegrams are ignored;
Publisher_Enable = 1, DXB-
request-telegramme are processed
6 to 7 Res To be parameterized with 0 0