
Control Block Description
ADDvantage-32 PLUS
4-75
4.53 PROPORTIONAL AND INTEGRAL CONTROL (PI)
The PI block performs a proportional and integral gain function on an error signal. It has
inputs for maximum and minimum limits which prevent the loop from overcompensating.
FIGURE 4-53. PI BLOCK
1. Inputs Data Type Description
ERR: Analog Input Signal
P: Analog Proportional Gain Value
I: Analog Integral Gain Value
MAXL: Analog Output High Limit Value
MINL: Analog Output Low Limit Value
PREL: Analog Integrator Preload Value
HOLD: Bit Integrator Hold Enable
PRE: Bit Integrator Preload Enable
+
+
+
+
ERR ERR>0 MAX
ERR<0 MIN
P
I
PRE
PREL
IERR
MINL
MIN
OUT
MAXL
MAX
PIBLOCK
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