IM-P343-35 CTLS Issue 5
46
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TRANSLATION RUN OVER
SP500 Electropneumatic Smart Positioner
9.5.1 VALVE - valve type
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Programming notes
Provides selection between 2-port and 3-port valves. Default is 2-port valve.
Default values for travel limit settings (MIN-T and MAX-T) and early vent/ inflate settings (S-MIN and S-MAX)
will depend on the valve type (2-port or 3-port) and control action (direct or reverse) as follows:
Valve type
2-port 3-port
Display Direct Reverse Direct Reverse
MIN-T 0% 0% 0% 0%
MAX-T 95% 95% 100 100%
S-MIN 0.1% OFF 0.1% 0.1%
S-MAX OFF 0.1% 0.1% 0.1%
Use and keys to select type. Press key to accept displayed type and advance to actuator type (ACT).
Commissioning notes
Selection of 2-port or 3-port valves will automatically alter the maximum travel default value (MAX-T)
to 95% for 2-port and 100% for 3-port valves. Advance to MAX-T to change these values if required.
9.5.2 ACT - actuator type
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Programming notes
ACT selection makes the positioner control more fluid and reactive, improving feedback to the control signal.
Selection is: 'ON' or 'OFF'. Default value is 'OFF'.
Use the and keys to toggle selection. Press key to accept displayed value and advance to Control
action (CTRLA).
Commissioning notes
If the actuator or the valve have high hysteresis or high friction it is suggested to set ACT to 'OFF'.
If hunting is present set ACT to 'OFF'.
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