ProSoft Technology PTQ-AFC - Manual (Page 204)

Diagnostics and Troubleshooting PTQ-AFC ♦ Modicon Quantum Platform
User Manual Liquid and Gas Flow Computer for Hydrocarbon Products
Page 204 of 259 ProSoft Technology, Inc.
June 23, 2011
10.3 Meter Alarms
If the module is generating unexpected data, you should verify if the meter has
any alarms. Some alarms may be caused by an issue that could potentially affect
the calculation results. Each archive also keeps track of the alarms that have
occurred during the period (refer to the Archive section). The Meter Monitor
dialog box allows you to monitor the meter alarms.
The above image shows the Meter Alarms bitmap, which gives you a quick
overview of active alarms. Associated with many of these bits are Alarm Code
registers which supply specific reasons for the alarms, most of which appear in
the lower right corner of the main Meter Monitor window. For complete
information, including which Code registers are associated with which alarm bits,
use the Modbus Dictionary feature of AFC Manager.
The possible alarms are listed in the following table. Of the Alarm Codes listed,
the values that can actually appear depend on both the selected Product Group
and the firmware version.
Alarm Message Description Solution
Accumulation
Overflow The module ignores an accumulator
increment of less than zero or greater
than 1.000.000.000 occurring in a
single meter scan. Check your meter configuration to
verify if your project is generating
reasonable values.
Analysis Total Not
Normalized (v

2.04)
Absolute difference between analysis
total and 1.0000 (100%) is greater
than the error tolerance Make sure that the sum of all molar
concentrations is within the error
tolerance of 1.0000 (100%).
Analysis Total Zero
(v
 2.04)
The molar concentration sum is zero. Make sure that the sum of all molar
concentrations is within the error
tolerance of 1.0000 (100%).