DIF – Difference

Block SymbolLicensing group: STANDARD

Function Description
The DIF block differentiates the input signal u according to the following formula

y_{k} = u_{k} - u_{k - 1},

where $u_{k} = u$ , $y_{k} = y$ and $u_{k - 1}$ is the value of input u in the previous cycle (delay $T_{S}$ , which is the execution period of the block).

The parameter ISSF sets the behavior of the block in the first cycle of task execution. If off, $y = u$ will be output in the first cycle. For the value on, the output will be $y = 0$ in the first cycle.

This block propagates the signal quality. More information can be found in the 1.4 section.

Input

u	Analog input of the block	Double (F64)
R1	Block reset	Bool
HLD	Hold	Bool

Parameter

ISSF

Zero output at start-up

Bool

off ..: Non-zero output in the first cycle
on ...: Zero output in the first cycle

Output

y	Difference of the input signal	Double (F64)

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