Rockwell Automation 1734-IA2, User Manual

Page: 21 / 242

Publication 1734-UM001D-EN-P - April 2008
About the Modules 21
Input Modules
These features are available on input modules.
•
Latching alarms, when set, latch low- and high-alarm status information.
Available alarms include:
– Low.
– Low Low.
– High.
– High High.
•
Disable alarms - disables all channel alarms and faults so they are not
reported in the channel status field. Four different alarms are available.
•
Settable update rate update rate determines how often an input channel
is scanned.
•
Notch filter is selectable for both inputs (50, 60, 250, and
500 Hz).
•
Digital filter sets a time constant.
Output Modules
These are features available on output modules.
•
Latching alarms, when set, latch low and high clamp alarm status
information.
•
Low and high clamps can be set individually or on a channel basis.
When the output value reaches clamp value, a status bit is set, indicating
the output is clamped.
•
Disable alarms - disables all channel alarms and faults so they are not
reported in the channel status field.
•
Fault and Idle mode action let you select what happens to the output
if a fault occurs or if the module is in idle mode. The choices are the
following:
– Hold Last State
– Low Clamp
– High Clamp
– User-defined value