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Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999

Landis & Staefa Division Function DPO 2-75

2.11 DPO Data Processing Operations

The name DATA PROCESSING refers to a VISONIK DCS software package which

allows the following functions:

•

Data collection and storing

•

Data transfer (e.g. to PCs)

•

Data presentation (using tables and graphs)

There are three main Functions associated with DATA PROCESSING:

•

DPO

Data Processing Operations

•

DPC

Data Processing Communication

•

DPP

Data Processing Presentation

These main functions have, to a large extent, the same basic structure. Function DPO is

particularly suited for configuration, while DPP is a more a user Function for adapting

the presentation of data.

2.11.1 Initial Entry and Handling

CTRL/P DPO

T8 08:26:32 Function=PNT : DPO

Operation=LI : ?

0 GEN = Generate Value Log

1 DEL = Delete Value Log

2 DIR = Contents of Value Log

3 LI = List Values numerically

4 MOD = Modify Values

5 SERV = Select Service Functions

6 FRAM = Free space in Value Log

Operation=LI :

With Function DPO any parameter values related to real and fictitious points, (which are

practical for DATA PROCESSING purposes), can be logged over a defined time interval

and stored on a VISONIK DCS hard disk.

Either digital or analogue values may be logged. A preliminary condition however, is that

any such points must exist in the process image (generated). Up to one million

instantaneous values can be stored depending on system and hard disk structuring.

Each stored value is automatically complemented with a 'Validity Marker' which provides

an indication of the relative stored value's plausibility. Validity markers appear in listings

of values (Operation LI). For example, the status of parameter OSV (Out of Service) can

be seen using such tagging. A marker is also printed which shows if a measurement

point has generated an Event during the logged interval. Refer to Operation LI (List

Values numerically).

DPO, DPP, DAPC

Function call-up

Main Menue

Application of DPO

Values that can be stored

Validity Marker