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Siemens Desigo SX Open - SX Configurator, V2.1 CM110702en_06

Building Technologies Worksheets in SX Configurator 20 Mar 2012

5.11 Functions sheet

Figure 5-38

The Function sheet is for entry of the predefined functions available via the

function block library, PRJLib.dll.

Only the functions that are actually needed in the main Configuration sheet

should be described.

Column Description

Function Name

Function name

Number of extra

Parameters

Number of optional extra parameters

Description

Descriptive text

Inverse Function

Inverse function, for use in cases where the function is used for signal mapping.

Library Prefix

Empty for functions located in PRJLib and EXT for mapping functions located in

a private mapping library.

For more information on the functions for signal and function mapping, refer to the

SX Open Engineering Guidelines [1].

5.12 BACnet Client sheet

Figure 5-39

SX Open normally operates as a BACnet server for the purpose of reading data

from third-party devices or systems for various uses in Desigo..

In the reverse process, however, where data is to be transmitted from Desigo to

third-party devices or systems, SX Open must also be able to act as a client on the

BACnet side. In SX Open this facility is also included as an autonomous function,

allowing the interconnection of various BACnet objects. This means, for example,

that a connection (and hence the mapping of a value) can be configured between a

Desigo PX BACnet object and an SX BACnet object. As soon as there is a change

of value in the PX object, the value is transmitted to the connected SX object. As

this, in turn, is connected to OPC, the value is also output on the OPC side.

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Siemens SX Series User's Guide Page 60