Profibus Dp Extensions; Set_(Ext_)Prm (Sap 53 / Sap 61) - Profichip VPC3+C User Manual

7.1

Set_(Ext_)Prm (SAP 53 / SAP 61)

The PROFIBUS DP extensions require three bytes to implement the new
parameterization function. The bits of the Spec_User_Prm_Byte are
included.
Byte
0
6
7
8
9
10
243
Figure 7-1: Set_Prm with DPV1_Status bytes
If the extensions are used, the bit Spec_Clear_Mode in Mode
Register 0 serves as Fail_Safe_required. Therefore it is used for a
comparison with the bit Fail_Safe in parameter telegram. Whether the
DP-Master support the Fail_Safe mode or not is indicated by the
telegram bit. If the DP-Slave requires Fail_Safe but the DP-Master
doesn't the Prm_Fault bit is set.
If the VPC3+C should be used for DXB, IsoM or redundancy mode, the
parameterization data must be packed in a Structured_Prm_Data block to
distinguish between the User_Prm_Data. The bit Prm_Structure indicates
this.
If redundancy should be supported, the PrmCmd_Supported bit in Mode
Register 0 must be set.
VPC3+C User Manual
Copyright © profichip GmbH 2004-2006

PROFIBUS DP Extensions

7 6 5
:
0 0
:
Revision 1.03
Bit Position
4 3 2 1
0
Alarm_Mode
7 PROFIBUS DP Extensions
Designation
0
DPV1_Status_1
DPV1_Status_2
DPV1_Status_3
User_Prm_Data
7
53