NION-16C48M Configuration
Functional Properties of the NION-16C48M
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NION-16C48M Installation & Operation Manual - P/N: 53347:Rev: A1 5/5/09
3.5 Functional Properties of the NION-16C48M
There are several properties involved with the operation of inputs and outputs on discrete point
NIONs. Each of these properties must be considered carefully when configuring points and I/O
schedules.
3.5.1 Input Properties
The two main properties of any discrete NION input are its mode and state.
Mode - The mode of an input is a logical condition assigned to the point which controls the way
data from the input is handled, recorded or annunciated. Each input on a NION may be placed in
one of four operational modes. These are:
ARM
DISARM
OVERRIDE
DISABLE
State - The state of the input is the actual physical status of the point being monitored. The states
are:
Input Active
Input Normal
Open Circuit
Short Circuit
The NION reports different point states based on the current operational mode of the input.
3.5.2 Rules for Mode Change Commands
The mode of any input may be changed by any of these methods:
•
Scheduled - time codes defined in the plug-in. When a time code becomes active (Start Time)
the input is disarmed. When the time code expires (Stop Time) the input is armed. During the
intermediate time between start and stop, the scheduler will not automatically alter the mode of
an input.
•
Manual - user action. Such action can only be initiated from the Workstation.
•
Automatic - NetLogic equation execution. After evaluating an equation, NetLogic may
execute an action which sends a command to the NION.
Scheduled, manual and automatic are all equivalent in priority. As each mode change command is
received, it is given priority over any previously received command.
NOTE:
There are exceptions to the rule of equal priority between mode change commands. These
exceptions are noted as follows and in the detailed description of each mode below.
