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

Building Technologies Worksheets in SX Configurator 20 Mar 2012

Figure 5-40

The client connections, too, can be configured in SX Configurator.

The sheet has two sections, for Source and Destination. The Source section

contains the address of the object which is the source of the value (e.g. a DMAP

object from PX),

and the Destination section contains the address of the object to

which the value is to be transmitted (e.g. an SX-BACnet object). The full address of

an object comprises the following:

• Device instance

• Object type

• Object instance

• Object name

SX can either subscribe to changes of value ("COV mode", "confirmed" or

"unconfirmed") or it can read the values cyclically ("polling mode").

SX provides a PresentValue to PresentValue mapping only.

Column Description of the Source and Destination sections

Device Instance

Instance number of the BACnet device object.

Object type

Type of BACnet object

Object Instance

Instance of the BACnet object.

Object name

Name of the BACnet object; if object instance is configured, too, the latter will be used.

Type of source-value subscription

The following are valid:

= unconfirmed COV

= confirmed COV

Mode

= polling

Cycle Time

If the BACnet client subscribes to changes of value (Mode = 1 or 2), a repeat time in

[s] must be defined for the subscription.

If the source value is to be polled (Mode = 3), the cycle time must be specified in [s].

Unlimited lifetime – cycle time is 0 – is supported though not recommended.

In case of SX BACnet Server as source, cyclic time 0 is only allowed for

unconfirmed notifications.

Configuring a

BACnet client

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Siemens SX Series User's Guide Page 61