Rockwell Automation 1734-IA2, User Manual

Page: 118 / 242

Publication 1734-UM001D-EN-P - April 2008
116 POINT I/O Module Data
Low and High Clamps
The clamps define the maximum and minimum values of the output. These
default to the following with the data scaled:
•
-32,768 counts (0 or 4 mA) and +32,767 counts (21 mA) for the
1734-OE2C module
•
-32,768 counts (0 or -10V) and +32,767 counts (+10V) for the
1734-OE2V module
Each clamp can be set individually and on a per-channel basis. When the
output value reaches clamp value, a status bit is set, indicating the output has
been clamped. The clamps are absolute. Regardless of what is sent to the
module or what the fault state values are, the module does not operate outside
these settings.
Latch Alarms
The latched alarms let low and high clamp status information to be latched. If
an output is clamped momentarily, the clamp status bit stays set until a reset
latch service is issued. The default setting is Unlatched. Each channel can be
configured individually. You can enable the Latch on a per-channel basis.
Alarm Disable
This function disables all channel alarms and faults so they are not reported in
the channel status field. The channel LED status indicator stays solid green,
and Latch Alarms are ignored. Change-of-state has no effect on module
behavior. Default state is Alarms Enabled. Each channel can be configured
individually. You can disable Alarms on a per-channel basis or they can be set
with the Module Configuration Assembly.