Rockwell-automation FactoryTalk View Site Edition Users Guide Instrukcja Użytkownika Pobierz pdf (Strona 470)

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FACTORYTALK VIEW SITE EDITION USER’S GUIDE

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Most indicators have several states, and an error state. The error state occurs when the

indicator is receiving invalid data.

Set up states for an indicator object in the Connections tab of the Properties dialog box.

Using the Least Significant bit to trigger states

The Least Significant Bit (LSB) trigger type changes the indicator’s state based on the

position of the lowest bit in the tag’s value. Any higher bit positions are ignored.

Each bit position in the tag’s value corresponds to one of the indicator’s states: for

example, position 1 triggers state 1.

The number of states a tag’s value can trigger depends on the tag’s data type. For example,

a tag of type long integer can be used to change up to 33 of an indicator’s states (32 bit

positions plus zero).

You can use a programmable controller to set these bits individually.

Setting up connections for indicators

To connect with a device such as a programmable controller, indicators use a tag or

expression called the Indicator tag or expression.

The Indicator tag is similar to a pilot light on a hard-wired panel. The tag or expression

changes the indicator’s appearance for each of its states, providing visual feedback to the

operator. For example, the Indicator tag can show that a process is running or stopped.

Set up the Indicator tag or expression in the Connections tab of the Properties dialog box.

Creating multistate indicators

Use the Multistate Indicator tool to create an indicator that shows the current state of a

process or operation by showing a different color, caption, or image for each state.

In the Multistate Indicator Properties dialog box, specify state values for the multistate

indicator. For details about options in the Properties dialog box, click Help.

At run time, the multistate indicator shows the state whose value matches the Indicator tag

or expression’s value.

The List indicator has no error state. If the value of the Indicator tag does not match an available

state, none of the states is highlighted.

Multistate

Indicator tool

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