Emerson HD22020-3 charging power module controller system spare parts

Description

This section defifines direct-access Ovation shared memory registers from the

Controller point of view. The HD22020-3 Controller point-of-view is at the internal workings of

the algorithm (the MASTATION is assumed). Conversions may occur between the

applications level and the level described here. This HD22020-3 format is used for start up,

local, and normal operating modes. In test mode, the format changes except for the

mode bits in register 6 (status register 1), Bits 0 through 3, and the FIFO control bits

in both the command register and status register 2.

PI Controller gain outside of deadband. This value is the higher of two gain values used

in the position PI loop. This value is used when the HD22020-3 valve is moving. When the valve is

in a stable position, a lower value is used to avoid noise-induced control action.

piResetT =

1000

PI Controller reset time outside of deadband. Used in PI equation along with the gain

value described previously. This value is one of two used in the PI equation. This one

is used when the valve is in motion, and causes faster wind-up. It is given in

milliseconds.

piGainDb = 1.0 PI Controller gain inside of deadband. When the valve is in a steady position, the PI

gain is reduced to this value. This HD22020-3 helps avoid noise-induced control action.

piResetTDb =

10000

PI Controller reset time inside of deadband. This is one of two values used, and causes

slower control action. It is given in units of milliseconds.

demodGain =

2048

The LVDT secondary feedback sum is multiplied by this value to achieve a voltage

range representing 0 to 100% position that is close to the input range of the A/D

converter. The value is printed as a raw decimal value. The hexadecimal equivalent is

written to the feedback D/A converter to adjust feedback gain. This value can be

entered by the customer, but it is also modifified automatically during the full calibration

sequence.

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