Woodward 5136-RE2-PCI card spare parts
Technical data of product parameters
Calibrate mode is a submode of local-manual mode. Calibration sequences are 5136-RE2-PCI
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 5136-RE2-PCI
and begin its travel sequence. During the travel 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 supportedhis calibration sequence is executed to re-establish 0% position, 100%
position, and feedback gain.
When full calibration is requested the module enters local mode, requiring the
Controller to track. The module then moves the value to the 0% position. The
firmware checks for position feedback between the arbitrary limits of –9.7 volts
and –2.0 volts. If the voltage is less (more negative) than –9.7 volts, the firmware 5136-RE2-PCI
reduces gain to make the voltage more positive than –9.7. If the voltage is more 5136-RE2-PCI
positive than –2.0 volts, the gain is increased until the voltage is more negative
than –2.0 volts. During these two sequences, the gain is tested to insure it does
not go out of allowable range.
If the voltage is between –9.7 and –2.0, then gain is recalculated to set the
voltage to the arbitrary target voltage of –0.35 volts, and the firmware sequence
advances to the next state, which will take the value to 100%.
At this point in the sequence, the demodulator gain has been set to a value that
is a maximum allowable value. The gain may be reduced at the other end of the
stroke, but will not be increased.
Product picture display
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