IM-P343-35 CTLS Issue 5
50
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SP500 Electropneumatic Smart Positioner
9.5.6 DTRVL - displayed travel percentage
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Programming notes
The full mechanical limits of valve travel (0 to 100%) are measured during autostroke (AUTOS).
It is possible to limit the minimum and maximum valve travel by programming MIN-T and MAX-T values, i.e.
MAX-T maximum travel limit of 95% (Autostroke default value for 2-port valves).
DTRVL (0 to 100% displayed travel value) can be displayed over the actual mechanical travel limits (as
measured during Autostroke), or adjusted MIN-T and MAX-T travel settings.
DTRVL programming options
DTRVL - ON will display 0 to 100% over the MIN-T and MAX-T travel settings,
or,
DTRVL - OFF will display 0 to 100% over the actual mechanical limits of travel.
Default value is DTRVL - ON. Use and keys to toggle selection.
Press key to accept displayed 'ON' or 'OFF' option and advance to minimum range setting (MIN-R).
Examples
MAX-T = 95%
MIN-T = 0%
MAX-T = 95%
MIN-T = 5%
Display values
DTRVL - ON DTRVL - OFF
100% 95%
0% 0%
Commissioning notes
DTRVL provides the choice of travel display. For 2-port valves you can adjust the MAX-T setting to
achieve the actual desired valve lift (i.e. 20 mm or 30 mm, etc). Using DTRVL you can then choose
to display the MAX-T valve travel you have set as 100%.
Example 1 Example 2
Display values
DTRVL - ON DTRVL - OFF
100% 95%
0% 5%
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