L-Proxy User Manual
132
LOYTEC
Version 3.1
LOYTEC electronics GmbH
Figure 141: Max Cache Age setting for nvoSystemTemp on node lproxy1 2
8.4 Poll-On-Startup Proxy
Some scenarios require that at power-up or after a reset the network variable values from
the source node should be polled once to obtain the current state of these network
variables. In the Configurator software a poll-on-startup flag can be set for each individual
input NV. An example is shown in Figure 142. The rate for sending poll-on-startup polls is
automatically adjusted to not saturate the network channel.
Figure 142: The poll-on-startup flag is set for this input NV.
8.5 SNVT Translation
The L-Proxy can generate connections containing data points of the same class (e.g.,
analog points). See also Section 6.4. This feature can be used to convert between different
scalar SNVTs, which is often referred to as “SNVT translation”.
The example in Figure 143 shows a node 1 that has network variables nvoAmpere of
SNVT_amp and nvoTemperature of SNVT_temp. It also shows a node 2 with network
variables nviAmpere_mil of SNVT_amp_mil and nviTemperature_f of SNVT_temp_f.
Since the network variables are of different type on node 1 and on node2 these NVs cannot
be bound directly. The L-Proxy can act as a translator between the different network
variable types as shown in Figure 143.
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