48 Rockwell Automation Publication 5000-UM005B-EN-P - November 2015
Chapter 3 Current/Voltage Analog Input Module Features (5069-IF8)
Open Wire Detection
Open Wire Detection detects when a wire is disconnected from the channel. You
must enable Open Wire Detection in the module configuration.
To see where to enable Open Wire Detection on the 5069-IF8 module, see
page 93.
Table 10 describes the results of an Open Wire condition occurring when the
module is operating in each mode.
Over Temperature Detection
The Over Temperature Detection feature indicates that the temperature of the
conditions within which the module is operating are higher than the module
operating limits.
When an Over Temperature condition exists, the I.Chxx.OverTemperature tag is
set to 1.
Table 10 - Open Wire Conditions
Mode Cause of Detection Resulting Module Behavior
Current (mA) The input signal for a channel is
below 100 μA.
IMPORTANT: This feature is
available in Current mode only when
the channel uses the 4…20 mA
input range.
• Input data for the channel changes to a specific scaled value corresponding to the Underrange value for the
channel’s Input Range.
• The I:Chxx.OpenWire tag changes to 1.
• A fault occurs and the I:Chxx.Fault tag is set to 1.
Voltage The input signal value reaches full
scale of the input range used.
• Input data for the channel changes to a specific scaled value corresponding to the Overrange value for the
channel’s Input Range.
• The I:Chxx.OpenWire tag changes to 1.
• A fault occurs and the I:Chxx.Fault tag is set to 1.
IMPORTANT
The Disable All Alarms feature, does not disable the Open Wire Detection
feature. The Disable All Alarms feature disables all alarms on the module.
The Open Wire Detection feature is not an alarm. It is an indicator that a
wire has been disconnected from the channel but does not trigger an
alarm.
To disable the Open Wire Detection feature, you must clear the Open Wire
Detection checkbox in the module configuration.
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