Decrement

Version 1.8

function Decrement(symbol: Symbol, minValue?: number): void

Version 1.10

function Decrement(ctx: Required<TcHmi.Context>, symbol: TcHmi.Symbol | null, minValue?: number | null, stepWidth?: number | null): void

The Decrement function counts a numerical value in a binding downward in steps of a specified step size.

Parameter

Name	Type	Description
ctx Available from version 1.10	Required<TcHmi.Context>	Context object Does not need to be specified by the user when used in a trigger or function expression. In this case the transfer and the evaluation is done by the corresponding parser. Is used by the caller to indicate success or failure to the framework during execution. If the function is used directly in JavaScript/TypeScript, the context object must be passed in the call and evaluated if necessary.
value	Symbol	The value to be decremented. The value must be specified as a binding to a symbol.
minValue	number	A minimum value that may not be undershot.
stepWidth	number	The step size with which the value is to be decremented.

Type	Description
void	No return value.

NuGet package: Beckhoff.TwinCAT.HMI.Functions

	NuGet packages are available from version 1.12.

	Available from 1.8