Technical Specifications

Limit Switch Threshold

Configuration Services

Limit Testing

1. Isolate the valve from the process.

2. Place the FVP in Manual Operating State. The valve must be calibrated and

supplied with correct supply pressure.

3. Measure closed position by:

a. Entering a Set Point of -10%.

b. Wait for the valve to reach it's final value and record the actual position of the

closed mechanical stop. The actual position must be less negative than the

target position to verify the valve has reached the stop. If the actual position and

target position are equal, reduce the Set Point until the valve reaches the stop.

4. Disable Tight Shutoff Below and Position Lower Limit by deducting 10% from the

recorded value.

5. Measure open position by:

a. Entering a Set Point of 110%.

b. Wait for the valve to reach it's final value and record the actual position of the

open mechanical stop. The actual position must be less than the target position

to verify the valve has reached the stop. If the actual position and target position

are equal increase the Set Point until the valve reaches the stop.

6. To disable Full Open Above and Position Upper Limit add 10% to the value

recorded above.

Limit Switch Threshold

The Limit Switch thresholds apply to the Discrete Input Block (DI) Set Points.

Threshold Low Threshold for the low limit switch that communicates by the DI.

Threshold High Threshold for the high limit switch that is communicated by the

DI.

Fault Control

Error Band The position deviation limit to start Time 1 deviation timer and

Time 2. Set this value to a value that is exceeded only in abnor-

mal performance.

Time 1 The position deviation time limit to show the block alarm. A neg-

ative value turns off this function. Set this value greater than the

stroking time.

Time 2 The position deviation time limit to trigger the failsafe action. A

negative value turns off this function.