HaModDerivative (FB)

FUNCTION_BLOCK HaModDerivative

Function block HaModDerivative is a standard derivative 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

In

REAL

0

1:Input variable

Tm

DINT

0

2:Time since last call in msec

Reset

BOOL

FALSE

3:Reset: Out is set to zero

Output

Out

REAL

0

1:Value of the Derivation