Table of Contents
Advertisement
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 supports 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+S 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+S User Manual
Copyright © profichip GmbH, 2012
PROFIBUS DP Extensions
Bit Position
7
6
5
4
0
0
Revision 1.04
7
3
2
1
0
0
Alarm_Mode
7
PROFIBUS DP Extensions
Designation
DPV1_Status_1
DPV1_Status_2
DPV1_Status_3
User_Prm_Data
59
Advertisement
Table of Contents
