Rockwell-automation Migrating PanelView Enhanced Terminal Applications User Manual download pdf (Page 83)

Publication 2711P-QS001A-EN-P - October 2007 83

Review Unsupported Features and Implement Workarounds for Migration Issues Chapter 6

Retain Last State

Workaround

PanelBuilder 1400e software has a Retain the Last State feature for the

cursor list object. If this feature is enabled, when the operator returns

to a display with the cursor list, the last selected state is retained and

reselected. To achieve the same functionality in your FactoryTalk View

ME application, you need to implement this workaround.

• Set up a Display Shutdown macro to write the currently selected

value to a memory tag.

• Set up a Display Startup macro to read the value of the memory

tag and write the value to the Value connection of the piloted

control list selector.

Follows these steps to implement the workaround.

1. Open your new application

migrated into FactoryTalk

View ME software.

2. In the Explorer window,

expand HMI Tags and

double-click Tags to open

the tag database.

3. Create a new tag.

a. Name the tag

RetainLastState.

b. Set the Tag Type to

Analog.

c. Set the Tag Type to Analog.

d. Set the Minimum and

Maximum values to the

number of items the

piloted control list

selector will scroll

through.

e. Select Memory as the

Data Source Type.

f. Set the Initial Value to 0.

g. Verify the Retentive check

box is checked.

4. Click Accept to save the

changes.

Create a similar tag for each

piloted control list selector that

requires the Retain the Last State

feature.

TIP

The retentive feature retains the last value written to the tag. If

you cycle power to the terminal, the last known value written to

the tag is loaded instead of the Initial value.

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