Rockwell Automation 1734-IA2, User Manual

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Publication 1734-UM001D-EN-P - April 2008
110 POINT I/O Module Data
Alarms
Available alarms include the following:
•
Low
•
Low Low
•
High
•
High High
Each alarm has one status bit which is set to indicate when the input goes
beyond its set point. All Alarm Status bits can be read individually or from the
Channel Status Byte (bits 2…5).
You can configure each channel alarm individually.
Range Status
The module reports both Under Range and Over Range status.
•
Under Range Status - This bit (Channel Status Bit 6) is set when the
module returned data is at a minimum.
– For the 1734-IE2C module, the value is 98 counts
(around 120
μ
A).
– For the 1734-IE2V module, the value is -0.25 or -10.25V, depending
on mode.
– When set, the channel status indicator blinks red.
– On the 1734-IE2C module, a wire-off condition sets this bit.
•
Over Range Status - This bit (Channel Status Bit 7) is set when the
module returned data is at a maximum.
– For the 1734-IE2C module, the value is around 21 mA
– For the 1734-IE2V module, the value is +10.25V.
– When set, the channel status indicator blinks red.
– On the 1734-IE2V module, a wire-off condition sets this bit.