Festo CPX-FB13 - A.3 Access to the CPX Terminal Via DPV1

A. Technical appendix
A−9
Festo P.BE−CPX−FB13−EN en 0811c
A.3 Access to the CPX terminal via DPV1
By means of DPV1 commands, you can access all the data
and parameters which the CPX terminal provides:
 Parameter and status information
 System data
DPV1 commands are only available if you configure the field
bus node with the following possibility:
 FB13: DP slave system diagnosis
You can easily access the system data via
the PROFIB US
configuration software. Background information can be found
in the CPX system manual P.BE−CPX−SYS−...
A.3.1 Reading and writing data records
Various function modules are available for reading and
writing data. The following table provides an overview:
Function
Function module
Siemens S7 (former)
Function module
Siemens S7 (new)
Functional module
DP standard
Read data SFC 59 RD_REC SFB 52 RDREC DP_RDREC
Write data SFC 58 WR_REC SFB 53 WRREC DP_WRREC
DPV1 compatibility
*)
S7 compatible" S7 compatible"
IEC 61131−3
Standard"
EN 50170
*)
Parameterisation of the field bus node as in the following section
Tab.A/7: Overview of function modules for reading and writing data records