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

Building Technologies Worksheets in SX Configurator 20 Mar 2012

To support VT_BSTR items e.g. for signaling a state, these strings must be

translated in a unique number which can be handled by SX Open. These strings

have to be mapped to hash values in SX Configurator (see Hash VT_BSTR

sheet). The same hashing function will be used in SX Open as soon as string is

received from OPC Client. By defining a mapping function which knows about the

different hash values a mapping of strings to a discrete set of numbers is possible.

For direction OPC mapping function which is used to map a BACnet property to an

OPC item must be entered. For direction BACnet or Twoway mapping function

which is used to map an OPC item to a BACnet property must be entered

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

Engineering Guideline [1].

5.2.11 Setting default values

Figure 5-28

To reduce the amount of work in entering values in Configuration sheet, default

values will be used whenever a field has been left blank. The default value can be

assigned by entering a value in column default of Properties sheet. If this field is

left blank, too, a build in default will be used.

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Siemens SX Series User's Guide Page 51