Process Control Instructions
62 Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
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 LDLG instruction provides a phase lead-lag compensation for an input signal.
This instruction is typically used for feedforward PID control or for process
simulations.
Available Languages
Ladder Diagram
This instruction is not available in ladder diagram.
Function Block
Structured Text
LDLG(LDLG_tag);
Operands
Function Block
Operand Type Format Description
LDLG tag LEAD_LAG Structure LDLG structure
Structured Text
Operand Type Format Description
LDLG tag LEAD_LAG Structure LDLG structure
See Structured Text Syntax for more information on the syntax of expressions
within structured text.
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