LOYTEC L-Proxy, Руководство пользователя

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L-Proxy User Manual 70 LOYTEC
Version 3.1 LOYTEC electronics GmbH
7.2.4 CEA-709 Properties
Apart from the common data point properties discussed in Section 7.2.3 the data points of
the CEA-709 technology have additional properties. Depending on if a NV is local or
external (remote), the properties may vary,
•
NV Allocation : This property defines how a data point shall be allocated on the
device. Choices are “Static NV”, “Dynamic NV”, and “External NV”. If the allocation
type cannot be changed, this property is locked.
•
SNVT : This property defines the SNVT of the NV, e.g., “lux (79)”.
•
Invalid Value : This property defines the “invalid value” for the NV. If set, this
specific value will be interpreted as “invalid” in the data point. If known by the SNVT,
the invalid value is filled in. Otherwise, the user can specify an invalid value.
•
CEA-709 Mapping Information : This information is derived from the SNVT. It
defines how the NV contents are mapped to the data point.
•
NV Scaling A, B, C : These are the scaling factors known from the SNVT table. The
scaling factors are applied to translate a raw NV value into the scalar representation of
the data point.
•
Data Type : This is the basic NV data type. This is usually filled in from the SNVT
definition.
•
Local NV Member Index : This property specifies the NV member index within a
given functional block. This must be a unique index in the functional block, which
identifies the NV after other NVs have been added or removed from the interface.
•
Local/Remote NV Index : This property specifies the NV index. For local, static NVs
this is the NV index of the static NV. For external NVs, this is the NV index of the NV
on the remote device.
•
Local/Remote NV Name : This property specifies the programmatic name of the NV.
For local, static NVs this is the programmatic name of the static NV. For external NVs,
this is the programmatic name of the NV on the remote device.
•
Local/Remote Functional Block : This property specifies the programmatic name of
the NV. For local, static NVs, one of the reserved functional blocks can be selected.
•
Local/Remote NV Flags : This property specifies the NV flags. For local (static or
dynamic) NVs, the flags can be configured. For external NVs, these flags are only
informational.
•
Remove NV Information : For external NVs, this property contains the information
on the remote device and the NV selector on that device.
•
Remote Device ID : For external NVs, this property contains information on the
remote device by listing the program ID and location string.
•
Remote Device Address : For external NVs, this property contains the CEA-709
network addressing information to access the node, i.e., subnet, node, and NID.
•
Retry Count : For external NVs, this property defines the retry count. The default is 3.
•
Repeat Timer : For external NVs, this property defines the repeat timer in
milliseconds. The default is 96 ms.
•
Transmit Timer : For external NVs, this property defines the transmit timer in
milliseconds. The default is 768 ms.
•
LNS Network Path : If available from an LNS scan, this property specifies the LNS
network path of the device where the given NV exists.
•
LNS Channel Name : If available from an LNS scan, this property specifies the LNS
channel name of the device where the given NV exists.