Chapter 18 Process control instructions
528 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
DERIVATE differentiates a Real value. If the CYCLE parameter value is less than
the cycle timing of the execution of the device, the sampling period is forced to
this cycle timing.
Derivate operation
The derivation is performed with a time base of milliseconds (that is, the
derivation of an input of 1000 that changes to 2000 over a time period of 1 second
results in a value of 1). To convert the output of the instruction to units of
seconds, the output must be multiplied by 1000.
Arguments
Parameter Parameter type Data type Description
RUN Input BOOL Mode: TRUE = normal / FALSE = reset.
XIN Input REAL Input: any real value.
CYCLE Input TIME Sampling period. Possible values range from 0ms to 23h59m59s999ms.
XOUT Output REAL Differentiated output.
ENO Output BOOL Enable out
Applies only to LD programs.
DERIVATE function block language examples
Function Block Diagram (FBD)
To Next Page
Loading...
