HaModCtd (FB)

FUNCTION_BLOCK HaModCtd

Function block HaModCtd is a standard down counter with automatic data synchronization in a high availability system Only internal variables and outputs are synchronized. Input variables and parameters are not synchronized. If needed, use HaModDataSync to achieve the same.

Note

It is not recommended to call utility blocks inside other function blocks in user application, this can impact the data synchronization between PLCs. For example, if HaModTon function block is used inside user’s function block, it will lead to data sync mismatch.

InOut:

Scope	Name	Type	Initial	Comment
Input	Cd	BOOL	FALSE	1:Count Down on rising edge
	Load	BOOL	FALSE	2:Load Start Value
	Pv	WORD	0	3:Start Value
Output	Q	BOOL	FALSE	1:Counter reached 0
	Cv	WORD	0	2:Current Counter Value