Technical Specifications

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Position Error Time Use this to define the amount of time a position error is allowed to
exist before the valve is put in failsafe position. The Position Error
Time must be between 1 and 328 seconds. If you set a value for Posi-
tion Error Time outside the range an error message appears
(Figure 102).
Figure 102 Position Error Time Error Message
Valve Stuck Limit The SVI II ESD issues an alert if a valve is stuck. When the SVI II ESD
begins PST, it continually checks the valve travel to see if the valve is
responding properly. If the valve is not travelling properly and
appears to be stuck, the SVI II ESD aborts the test and report that the
valve is stuck. Use the Stuck Limit fault setting to define the percent-
age of partial stroke that the valve is allowed to be stuck before a
status flag is issued. The Stuck Limit must be between 3% and 20%
of the total PST. If you set a value for Stuck Limit outside the range an
error message appears (Figure 103).
Figure 103 Stuck Limit Error Message
Linkage Limit Use this to define the amount the measured position is allowed to
deviate from the expected position during an energized stop. The
Linkage Limit setting is the percentage of deviation allowed between
the measured and expected positions. The Linkage Limit must be
between 1% and 20%. If you set a value for Linkage Limit outside the
range an error message appears (Figure 104).
Figure 104 Linkage Limit Error Message