270 Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
See also
Function Block Attributes on page 491
Common Attributes on page 537
Structured Text Syntax on page 508
This information applies to the CompactLogix 5370, ControlLogix 5570,
Compact GuardLogix 5370, GuardLogix 5570, Compact GuardLogix 5380,
CompactLogix 5380, CompactLogix 5480, ControlLogix 5580, and GuardLogix
5580 controllers.
The PI in
struction provides two methods of operation. The first method follows
the conventional PI algorithm in that the proportional and integral gains remain
constant over the range of the input signal (error). The second method uses a non-
linear algorithm where the proportional and integral gains vary over the range of
the input signal. The input signal is the deviation between the setpoint and
feedback of the process.
Available Languages
Ladder Diagram
This instruction is not available in ladder diagram.
Function Block
Structu
red Text
PI(PI_tag);
Operands
Function Block
Operand Type Format Description
PI tag PROP_INT structure PI structure
Proportional + Integral (PI)
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