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Chapter 4: Communication-Based Operation
4.7.4 Travel Histogram
Indicates how frequently the valve travels in the specified position ranges, as a propor-
tion of the total travel time.
[Travel Histogram]
Select [Diagnostics] >> [Valve Diagnostic Information] >> [Travel Histogram] >>
[Travel Histogram]. You will be able to check the following items.
■ Travel Histogram 1 to Travel Histogram 16
Displays the frequency of the specified position region as a percentage.
■ Update Travel Histogram
Updates per-position frequency distribution values 1 to 16 to the latest values.
• Select the [Update Travel Histogram] menu to execute the update.
■ Clear Travel Histogram
Deletes the per-position frequency distribution values.
• Select the [Clear Travel Histogram] menu to delete the values.
[Travel Segmentation]
Select [Diagnostics] >> [Valve Diagnostic Information] >> [Travel Histogram] >>
[Travel Segmentation]. You will be able to check or modify the following item.
■ Travel Segmentation 1 to Travel Segmentation 16
Displays and allows modification of the 15 position regions for the 16 positions.
4.7.5 0% Travel Error
When the valve is fully closed, the zero point from when zero adjustment was per-
formed is compared to the current zero point, and an alarm occurs if the discrepancy
between them is greater than or equal to a specified deviation and if this discrepancy
persists for longer than the specified time.
Select [Diagnostics] >> [Valve Diagnostic Information] >> [0% Travel Error]. You will
be able to check or modify the following items. To change a value, select the item and
then change it.
■ 0% Tvl Error +, 0% Tvl Error −
Displays and allows modification of the deviation on the “+” side and “−” side.
■ 0% Tvl Error Waiting Time
Displays and allows modification of the waiting time. An alarm occurs if the deviation
continues for longer than this waiting time.
■ 0% Tvl Error Alarm Enabled
Displays and allows modification of the alarm enabled/disabled status. If the status is
Enabled, alarms will occur, and if the status is Disabled, alarms will not occur.
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