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 limit values are configurable. 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. Each rising edge on the setpoint / parameter xButtonUp increases the output rOut by the step size rJumpValue. Each rising edge on the setpoint / parameter xButtonDown reduces 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 limited. \

Setting of 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 of the value range rSetPointMin and rSetPointMax

The following applies: rSetPointMin <= rSetPointMax The following applies: rSetPointMin = rSetPointMax = rOut If an input is made in which the above rules are not observed, 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