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Chapter 4: Communication-Based Operation
4.7 Valve Diagnostic Parameter Configuration
Performs configuration necessary for valve diagnostics.
4.7.1 Stick-Slip
A stick-slip value quantitatively represents abnormal valve movements caused by adhe-
sion, seizing, and the like. Select [Diagnostics] >> [Valve Diagnostic Information] >>
[Stick Slip]. You will be able to check or modify the following items. To change a value,
select the item and then change it.
■ Stick-Slip X
Displays the Stick Slip X value.
■ Stick-Slip Y
Displays the Stick Slip Y value.
■ Stick-Slip Count
Displays the Stick Slip Count.
■ Update Stick Slip
Updates the Stick Slip X value, Stick Slip Y value, and Stick Slip Count to the most re-
cent values.
• Select the [Update Stick Slip] menu to execute the update.
■ Clear Stick Slip Count
Resets the count to zero.
• Select the [Clear Stick Slip Count] menu to reset the count.
■ Stick Slip XY Threshold
Displays and allows modification of the XY threshold. This is the value which, when
reached or exceeded by the stick-slip value (Stick Slip Y divided by Stick Slip X), results
in incrementation of the count. (An alarm is not activated merely as a result of this
value being exceeded, but an alarm is activated if the count threshold is exceeded.)
■ Stick Slip Count Threshold
Displays and allows modification of the count threshold value. An alarm occurs if the
number of times the XY threshold is exceeded reaches or exceeds this value.
■ Stick Slip 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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