Hello,
We have
recently installed a compact RIO with two fill
ether cat extension racks; the total system has about 300 sensors/controls. The
RIO is controlling both extensive data logging
and a control application for a Thermal plant. We traditionally as a company
have deployed many applications similar to this using PLC’s and plc’s have what’s
called retentative memory available for storing SCADA parameters or any parameters
in the memory,
We are
using labview as the SCADA and shared variables hosted by the RIO
for all the SCADA parameters to be used by the Plant. Now the problem we have
with shared variables is they will not store the updated values from the SCADA
when the power is cycled to the RIO, they will go back to the default values
setup in the RIO
With the
retentative memory in PLC,s when the value is changed the controller will remember
that value on power cycling, is there any way of creating or setting up shared variables
in the RIO so their last set value is stored and remembered on power cycle. I know
I could do this with dat files and reading and writing out arrays of the shared
variables values to the compact Rio hard disk,
but it seams like a lot for what is a basic control requirement, for a
controller to remember previous values on power cycling of its critical
operating parameters.
Any advice
would be greatly accepted,
Thank you
