ABSTRACT
Setting a digital output is the simplest and most often used operation, especially in industrial control. In general, we would like to output any value. For this purpose the RTDB has an object type
NO
for numerical output. The NO object is a kind of switch (see Figure 13.1 and the Actions as described below) used to pass the
Out Data
defined in a DAT or PAR object to the output. The TAB object may be used to expand the possible sources of output data. We may also use NI and UDC objects as the source of NO
Out Data,
but that would be very unusual. One should note that a value could have been set into a DAT or PAR object in the RTDB by some other program, external to the StateWORKS system, if that were required for the application.
