Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 301
Output
Parameter Data Type Description
RTSTimeInv
(Satus.29)
BOOL Invalid RTSTime value.
RTSTimeStampInv
(Status.30)
BOOL Invalid RTSTimeStamp value.
DeltaT (Status.31) BOOL Invalid DeltaT value.
Structured Text
Operand Type Format Description
SOC tag SEC_ORDER_CONTROLLER structure SOC structure
See Structured Text Syntax for more information of the syntax of expressions
within structured text.
Description
The SOC instruction provides a gain term, a first order lag, and a second order
lead. The frequency of the lag is adjustable and the frequency and damping of the
lead is adjustable. The zero pair for the second order lead can be complex
(damping is less than unity) or real (damping to unity). The SOC instruction
is designed to execute in a task where the scan rate remains constant.
The SOC instruction uses the following Laplace Transfer equation.
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