
Control Block Description
ADDvantage-32 PLUS
4-77
If HOLD = HIGH and PRE = LOW, then:
The Integral Error component is held at its present value until the HOLD input
goes low. The integrator hold input is used to hold the output value during major
process disturbances.
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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