derivate

 Function Block - Computes the derivative of a signal with respect to time.

• The time unit is seconds.
• The output signal has the units of the input signal divided by seconds.
• The derivate block samples the input signal at a maximum rate of 1 millisecond.

Inputs

Input	Data Type See Data Types.	Range	Unit	Default	Description
RUN	BOOL	FALSE, TRUE			Run command: TRUE=derivate. FALSE=hold.
XIN	REAL				Input signal.
CYCLE	TIME				Sampling period. Must not be less than the target cycle timing.

Outputs

Output	Data Type See Data Types.	Range	Unit	Description
XOUT	REAL			Output signal.

FBD Language Example

FFLD Language Example

• In the FFLD Language, the input rung is the RUN command.
  • The output rung keeps the state of the input rung.
  • ENO has the same state as RUN.

IL Language Example

Not available.

ST Language Example

(* MyDerv is a declared instance of DERIVATE function block. *)
MyDerv (RUN, XIN, CYCLE);
XOUT := MyDerv.XOUT;

See Also

• average / averageL
• hyster
• integral
• lim_alrm
• stackint