Emerson KJ3241X1-BA1 12P2506X062 CE4006P2 shaft displacement and differential expansion monitor

Description

Normal is the CE4006P2 preferred mode of the Valve Positioner card. In normal mode, the

Valve Positioner is receiving a position set point from the Controller and controlling

valve position.

In normal mode, the following functions are performed:

• PI position control CE4006P2 loop (Demand position comes from the Controller via the

Ovation memory).

• Writes current valve position to Ovation I/O memory

• Writes coil voltages to Ovation I/O memory.
• Open coil diagnostic.
• Shorted coil diagnostic.
• EPROM checksum diagnostic.
• RAM diagnostic.
• Watchdog timing.
• SLIM interface (Updates SLIM values, no raise/lower function.)
• Valve contingency diagnostic.

Calibrate mode is a submode of local-manual mode. Calibration sequences are

commanded through the local serial port.

The Valve Positioner is commanded to calibrate when the appropriate bit in the

command word is set. This causes the Valve Positioner to enter the calibrate mode

and begin its travel sequence. During the travel CE4006P2 sequence, the Valve Positioner will

report a position feedback calculated using the most recent calibration numbers.

The controlling MASTATION will enter manual mode and track the position

demand feedback. The Valve Positioner moves the valve at a programmable rate

during the travel sequence.

The Valve Positioner can exit calibrate mode without enforcing a bumpless transfer

rule.

The following calibrate sequences are supported:

• Zero Hot Cal

This calibration sequence is executed to re-establish the 0% position. It is useful

after the valve has been fully calibrated CE4006P2 and the mechanical assembly has been

heated and expanded. It avoids fully opening the valve.

Feedback gain is not adjusted during the hot cal sequence.

• Top Hot Cal

This calibration sequence is executed to re-establish the 100% position. It is

useful after the valve has been fully calibrated and the mechanical assembly has

been heated and expanded. It avoids fully closing the valve.

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