L-INX User Manual
147
LOYTEC
Version 4.0
LOYTEC electronics GmbH
the original output NV for polling the target NV. Once the binding is changed the new
target is polled. No additional input NV needs to be created for the feedback value, if the
feedback data point feature is used.
To Create a Feedback Data Point
1.
Select an output data point in the data point list of the CEA-709 port folder, e.g.
‗nvoHumid101‘.
2.
Right-click and choose Create Feedback-Point from the context menu.
3.
A new input data point is created, having ‗_fb‘ appended to the original name, e.g.,
‗nvoHumid101_fb‘. Note, that the feedback data point maps to the same NV index as
the original output data point.
4.
Choose an appropriate poll cycle in the data point properties for the feedback data
point.
6.8.4 Working with Configuration Properties
Configuration properties (CPs) are supported by the LNS network scan and the online
network scan. They can be selected and used on the device in a similar way as NVs. There
is a notable difference to NVs: CPs are part of files on the remote nodes. Reading and
writing CPs on the device results in a file transfer.
The device supports both, the L
ON
M
ARK
file transfer and the simpler direct memory
read/write method. In both cases however, one has to keep in mind that a file transfer incurs
more overhead than a simple NV read/write. Therefore, polling CPs should be done at a
much slower rate than polling NVs.
Another aspect is how CPs are handled by network management tools. Formerly, those tools
were the only instance that could modify CPs in devices. Therefore, most tools do not
automatically read back CPs from the devices when browsing them. This can result in
inconsistencies between the actual CP contents on the device and their copy in the network
management tool. It is recommended to synchronize the CPs from the device into the LNS
database before editing and writing them back.
To Synchronize CPs in NL220
1.
Double-click on the device object in the device tree
2.
Press the
Upload
button on the Configuration tab of the device properties (see Figure
