NION-16C48M Configuration
I/O Configuration
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NION-16C48M Installation & Operation Manual - P/N: 53347:Rev: A1 5/5/09
3.2 I/O Configuration
3.2.1 Input State Condition
State Conditions
“I/O Point Connections” on page 24
for details about matching the setting to the
connection.
Latched States
On NION-16C48Ms, each of the 48 inputs has a contact configuration property. Inputs contacts
may be configured in one of nine different ways. Options include:
•
Not Configured - for unused inputs.
•
2 State Normally Open (Non-Latching) - normally open input reporting active and normal.
•
2 State Normally Closed (Non-Latching) - normally closed input reporting active and normal.
•
4 State Normally Open (Non-Latching) - normally open input reporting active, normal, short
and open.
•
4 State Normally Closed (Non-Latching) - normally closed input reporting active, normal,
short and open.
•
Latched 2 State Normally Open - normally open input reporting active and normal; when the
input changes to an active state, it is latched, and the point will not clear until the “Clear
Latched Points” command is performed.
•
Latched 2 State Normally Closed - normally closed input reporting active and normal; when
the input changes to an active state, it is latched, and the point will not clear until the “Clear
Latched Points” command is performed.
•
Latched 4 State Normally Open - normally open input reporting active, normal, short and
open; when the input changes to an active state, it is latched, and the point will not clear until
the “Clear Latched Points” command is performed.
•
Latched 4 State Normally Closed - normally closed input reporting active, normal, short and
open; when the input changes to an active state, it is latched, and the point will not clear until
the “Clear Latched Points” command is performed.
To configure a large block of inputs to the same state option on a NION, use the Multiple State
Configuration box on the I/O Configuration form. Simply enter the range of input points in the
From and To fields, select the desired state option in the Configure As combo box then click the Set
State button to finish.
Latching Inputs
When inputs are configured to be latching and in the armed mode, a transition to an off-normal
state is latched. This means that the node will report the input active event, then it will cease to
monitor that input point until it is explicitly released by the operator. This is done by right clicking
on any related device icon on the Workstation screen and selecting Clear Latched Points.
When the node receives the command to clear latched points, it will resume event monitoring for
the points in question (assuming they are no longer active), then it will report the current state of
the input. If a node receives a command to clear a latched point and the point is still active, it will
ignore the command, except in the case of a Disable command. If the point receives a Disable
command, it will send a Return to Normal event followed by a Disable event.
NOTE:
Latched points are cleared on a global basis, with all points on the NION being cleared
simultaneously.
