Rockwell Automation Allen-Bradley 1769-IF4, Руководство пользователя

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Publication 1769-UM002B-EN-P - July 2005
3-30 Module Data, Status, and Channel Configuration for the Input Modules
1769-IF8 Process Alarms
Process alarms alert you when the module has exceeded configured high or
low limits for
each channel . You can latch process alarms. These are set at
two user configurable alarm trigger points:
•
Process Alarm High
•
Process Alarm Low
Each input channel’s process alarms are controlled by bits in the
Configuration Data file. Enable alarms for a channel by setting (1) the EA bit
for that channel. Set the AL bit (1) for a channel to enable the alarm latching.
Each channel’s process alarm high data value and process alarm low data value
are set by entering values in the corresponding words of the Configuration
Data file for that channel.
The values entered for a channel’s process alarm data values must be within
the normal operating data range as set by the input Data Format selected for
that channel. If a process alarm data value is entered that is outside the normal
operating data range set for a channel, the module indicates a configuration
error.