Digital Acoustics ESBx-110 Spezifikationen PDF herunterladen (Seite 210)

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101

Control Block Description

ADDvantage-32 PLUS

4-80

will start to increase to keep OUT above the MINL limit.

If OUT > MAXL or H-UP = 1: The CMX bit = 1 (HIGH).

If OUT < MINL or H-DN = 1: The CMN bit = 1 (HIGH).

If H-UP = HIGH and PRE = LOW, then:

The Integral Error component cannot increase in the positive direction until the

H-UP input goes low. Positive ERR values are ignored by the integral error

component. The integrator hold up input is used to keep the integrator from

increasing in the positive direction during major process disturbances. Note that

the Proportional Error is not affected by the H-UP input.

If H-DN = HIGH and PRE = LOW, then:

The Integral Error component cannot increase in the negative direction until the

H-DN input goes low. Negative ERR values are ignored by the integral error

component. The integrator hold down input is used to keep the integrator from

increasing in the negative direction during major process disturbances. Note that

the Proportional Error is not affected by the H-DN input.

If PRE = HIGH, then:

The Integral Error component is set to the PREL value and the Proportional Error

component is set to zero so that:

OUT = IERR = PREL

The IERR output is equal to the integrator component and can be used for

diagnostic purposes.

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