Process Control Instructions; Derivate - Allen-Bradley Micro800 General Instructions Manual

Chapter 18

Process control instructions

DERIVATE

Parameter
RUN
XIN
CYCLE
XOUT
ENO
528
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 type Data type
Input BOOL
Input REAL
Input TIME
Output REAL
Output BOOL
DERIVATE function block language examples
Function Block Diagram (FBD)
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
Description
Mode: TRUE = normal / FALSE = reset.
Input: any real value.
Sampling period. Possible values range from 0ms to 23h59m59s999ms.
Differentiated output.
Enable out
Applies only to LD programs.