Enable Function

Overview

The enable function is used to authorize the counting operation.

The enable function is available in the following HSC modes:

HSC Main Single Phase (One-shot)
HSC Main Single Phase (Modulo-loop)
HSC Main Dual Phase (Modulo-loop)
HSC Main Dual Phase (Free-large)
Frequency Meter
Period Meter

It is not available in Event Counting mode.

Description

This function is used to authorize changes to the counter value depending on the status of the optional EN physical input and the function block inputs F_Enable and EN_Enable.

The following diagram illustrates the enable conditions:

EN_Enable input of the HSC function block

F_Enable input of the HSC function block

EN physical input Enable

As long as the function is not enabled, the counting pulses are ignored.

NOTE: Enable condition for a Simple type corresponds to the function block input Enable.

Configuration

This procedure describes how to configure an Enable function:

Step	Action
1	In the Devices tree, double-click MyController > IO_Bus > Module_x > Counters.
2	Select the Counters tab.
3	Select a Counting function that supports the Enable function: HSC Main Single Phase (One-shot or Modulo-loop) HSC Main Dual Phase (Modulo-loop or Free-large) Frequency Meter Period Meter
4	Set the value of the Control inputs > EN input > Location parameter.
5	Select the value of the Control inputs > EN input > Filter parameter to reduce the bounce effect on the input. The filtering value determines the counter maximum frequency as shown in the Bounce Filter table.