National Instruments NI-FBUS - Manual (Page 90)

Chapter 4 Parameters
© National Instruments Corporation 4-25 NI-FBUS Configurator User Manual
NV_CYCLE_T (Diagnostic)
The regular time interval, in milliseconds, at which nonvolatile parameters
are committed to nonvolatile storage. A value of zero means that the
parameters are never written to nonvolatile memory. Note that nonvolatile
parameters are stored to nonvolatile memory when they are changed by a
user over the network. The
NV_CYCLE_T parameter sets the rate at which
changes caused by the device itself are stored to nonvolatile memory.
OUT (Process, Scaling, Tuning)
The current output value of the block.
OUT_D (Process)
The current output value of a discrete block.
Local Override ( LO ) Faultstate or an interlock is active and causing the output value
of the block to be overridden. This is not a valid
TARGET mode,
but is a valid ACTUAL mode.
Manual ( Man ) The output value of the block is set by the user.
Automatic ( Auto ) The output value of the block is set by the block algorithm,
and the block is using a local value for its setpoint.
Cascade ( Cas ) The setpoint for the block is taken from the CAS_IN parameter,
which is typically connected to the output of another block. This
mode cannot be entered before cascade initialization takes place.
When Cascade is desired as a
TARGET mode, the Auto bit is also
set in the target.
Remote Cascade ( RCas ) Like Cascade mode, in Remote Cascade mode the setpoint of the
block comes from an outside data source. Unlike Cascade mode,
in Remote Cascade mode the setpoint is sourced from the
RCAS_IN parameter, which is written by a host application
and not another function block.
Remote Output ( ROut ) Remote Output mode is analogous to Remote Cascade mode,
except that the remote host application directly sets the output of
the block and not the setpoint. In the case of an analog output
block, this bypasses setpoint rate and absolute limiting.
Table 4-17. Operational Modes (Continued)
Operational Mode Description