Digital Acoustics ESBx-110 Dokumentacja Pobierz pdf (Strona 177)

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101

Control Block Description

ADDvantage-32 PLUS

4-47

4.32 DROOP

The Droop block modifies the speed reference to keep the drive armature current within a

particular range. This is useful for controlling a nipped roll where it is in contact with

another speed controlled section, or anywhere a "SOFT" speed regulator is required.

FIGURE 4-32. DROOP BLOCK

1. Inputs

CUR: Analog

STPT: Analog

GAIN: Analog

REF: Analog

ENABLE: Bit

2. Outputs

OUT: Analog

3. Implementation

If ENABLE bit low, OUT = REF.

If ENABLE bit high;

If ( - STPT) < CUR < STPT, then OUT = REF.

If STPT < CUR, then OUT = (STPT - CUR) × GAIN + REF

If STPT < - CUR, then OUT = - (STPT + CUR) × GAIN + REF

REF

CUR

STPT-STPT

GAIN

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Digital Acoustics ESBx-110 Dokumentacja Strona 177

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