knxnetIp-KnxPointDeviceExt

All KNXnet/IP proxy extension types (KnxBooleanProxyExt, KnxNumericProxyExt, KnxStringProxyExt and KnxEnumProxyExt) share the same set of configuration properties. Any instance of any of the KNXnet/IP proxy extension types is a proxy for one or more group address in a KNX installation.

The KNXnet/IP proxy extension types take on the readable-writable personality of the control point they are attached to. For example, a KnxNumericProxyExt, when used as an extension on a numeric point has read-only functionality, but when used on as an extension on a numeric writable it can read and write attribute values.

Figure 25.   Example of proxy extension properties
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You access these properties by expanding Config > Drivers > KnxNetwork > KnxDevice > Points followed by double-clicking the point in the Nav tree or the row in the KnxPointManager view.

The KNXnet/IP proxy extension types are the point-level component in the Framework architecture. In addition to the standard properties (Status, Fault Cause, Enabled), these properties apply to the KNX Proxy extension. Other properties, Device Facets, Conversion, Tuning Policy Name, Read Value, and Write Value are defined in the Niagara Drivers Guide.

Type Value Description
KNX ID read-only

Displays the KNX Installation ID.

Group Addresses additional features Defines a list of group addresses from which the value of this proxy extension can be updated.

The first group address in the list is the primary group address and cannot be deleted, but can be edited. This proxy extension directs read and write requests to this address.

The remaining group addresses update the proxy extension output value. This happens when the driver receives a message from any of these addresses.

Data Value Type ID drop-down list (defaults to Unknown) Defines the KNX data type for the address. It includes the size of the data value and its function. For example the data item may be a byte character or a one-byte percentage value. You typically use the data type as specified by the project file when you import the project, however, on occasion you may add points manually and will need to select the correct data type yourself.
Poll Enable true or false Enables and disables adding and removing the group address(es) configured on this proxy extension to the Poll Scheduler. In KNX, a group address responds to a read request only if it is configured to do so. For group addresses, where there is no bus device configured to send the value in response to a read, it makes sense not to poll the group address. In other cases, it may desirable not to put additional traffic on the bus if that traffic is not absolutely necessary.
Poll Once On Subscribed true or false Forces a poll when a point enters a subscribed state, such as when a user views it on a point list. If enabled, the resulting poll occurs independently of any other poll setting (for instance, it occurs even if Poll Enable is false and if the Poll Scheduler rate is zero or disabled.) To modify this behaviour, configure the Poll Until Answer Received On Poll Once property.
Poll Once On Operational true or false Forces a poll when the point status changes from disabled to enabled, down to up, and fault to noFault. If enabled, the resulting poll is independent, and occurs independently of any other poll setting (for instance, it occurs even if Poll Enable is false and if the Poll Scheduler rate is zero or disabled.) To modify this behaviour, configure the Poll Until Answer Received On Poll Once property.
Poll Until Answer After Poll Once true or false Setting Poll Once On Subscribed orPoll Once On Operational to true, and this value to true, modifies the poll once behaviour to poll until the driver receives a valid value instead of polling once and discarding the value. This has the effect of subscribing the point to the Poll Scheduler until such time as the point receives data addressed to the first group address in the list provided the value is a valid value for this point type. When these conditions are satisfied, the point is unregistered from the poll scheduler.
Poll After Write true or false Enables and disables a poll for a value after a write. This property is independent of the Poll Enable property.
Poll Frequency Fast, Normal, or Slow Selects how often to poll the device. The Poll Scheduler defines these rates.