FB_VIOLATIONCNT

Description Function Block

The FB_VIOLATIONCNT function block is used to implement a weighted error counter.

The bEnable input is used to activate or deactivate the counter. When the counter is deactivated, the bInputOK outputs are set to FALSE and ActViolationCnt is set to 0.

When bEnable is set to TRUE, the bInput input is checked each time the function block is called.

When the input bInput = TRUE, the error counter ActViolationCnt is decremented by the value uiDecrementNoError.
Note: The input can be negated, in which case the input signal must be FALSE.
When the input bInput = FALSE, the error counter ActViolationCnt is incremented by the value uiIncrementError.
Note: The input can be negated, in which case the input signal must be TRUE.

As soon as the error counter reaches the maximum value udiCounterLimit, bInputOK is set to FALSE.

Tip

The availability of this function block depends on the state indicators FBSupportFlags of the ESI description file. These flags FBSupportFlags are evaluated as of CODESYS Safety for EtherCAT Safety Module 4.3.0.0.

The usage of this function block is prevented if the device in question does not explicitly support this function block.

Table 58. VAR_INPUT

Name	Data Type	Initial Value	Description, Parameter Values
`bEnable`	`SAFEBOOL`	`FALSE`	Input for activating the function `TRUE`: The internal counter is activated. `FALSE`: The internal counter is deactivated.
`bInput`	`SAFEBOOL`	`FALSE`	When the counter is activated, the input is checked each time the function block is called. . Input not negated `TRUE`: Counter is decremented by the value `uiDecrementNoError`. `FALSE`: Counter is incremented by the value `uiIncrementError`. . Input negated `TRUE`: Counter is incremented by the value `uiIncrementError`. `FALSE`: Counter is decremented by the value `uiDecrementNoError`.
`uiIncrementError`	`SAFEUINT`	`0`	Value by which the internal counter is incremented Only a constant value is permitted (no variable)
`uiDecrementNoError`	`SAFEUINT`	`0`	Value by which the internal counter is decremented Only a constant value is permitted (no variable)
`udiCounterLimit`	`SAFEUINT`	`0`	Maximum value for the internal counter. Above this value, the `bInputOK` output is set to `FALSE`. Only a constant value is permitted (no variable)

Table 59. VAR_OUTPUT

Name	Data Type	Initial Value	Description, Parameter Values
`bInputOK`	`SAFEBOOL`	`FALSE`	When `Enable = TRUE` and the internal error counter is below the maximum value, the output is set to `TRUE`.
`ActViolationCnt`	`SAFEUINT`	`0`	Indicates the current internal counter value when the input `bEnable = TRUE`. Otherwise the output is set to `0`.