EditPoti

EditPoti (FB)

FUNCTION_BLOCK EditPoti

Short description

Setpoint generator with edge-controlled increase / decrease of the setpoint. The step size and the absolute minimum/maximum limits are adjustable. Typical application: Individual adjustment of a base temperature.

Representation

Interfaces

Outputs

Name	Data type	Value range	Initial value	Function
rOut	REAL			Analog - output

Setpoints / parameters

Name	Data type	Value range	Initial value	Function
xButtonUp	BOOL		FALSE	Increase of the setpoint
xButtonDown	BOOL		FALSE	Decrease of the setpoint
rJumpValue	REAL	> 0	0.2	Step size
rSetPointMin	REAL		-3.0	Absolute minimum value
rSetPointMax	REAL		3.0	Absolute maximum value

Function description

General

This function block is used to generate a setpoint at the output rOut. Every rising edge on the setpoint / parameter xButtonUp increases the output rOut by the step size rJumpValue. Every rising edge on the setpoint / parameter xButtonDown decreases the output rOut by the step size rJumpValue. The output rOut is limited to a value range between the absolute minimum value rSetPointMin and the absolute maximum value rSetPointMax is bounded.

Setting the step size rJumpValue

The step size rJumpValue may only take values greater than 0. Values less than 0 are automatically reset to 0.

Setting the value range rSetPointMin and rSetPointMax

The following applies: rSetPointMin <= rSetPointMax The following applies: rSetPointMin = rSetPointMax = rOut If an input is made that does not observe the above rules, then automatically rSetPointMin = rSetPointMax is set.

CODESYS

InOut:

Scope	Name	Type	Initial
Input Const	rSetPointMax	REAL	3.0
Input Const	rSetPointMin	REAL	-3.0
Input Const	rJumpValue	REAL	0.2
Input Const	xButtonDown	BOOL	FALSE
Input Const	xButtonUp	BOOL	FALSE
Output	rOut	REAL