Rockwell Automation 2711E-ND1 Reference Manual PanelBuilder 1400e - Manual (Page 117)

111 Push Buttons
Publication 2711E-6.15 – November 1998
An Interlocked Push Button is one of a group of buttons that have
the same control. The buttons function together in much the same
way as the station selector buttons on a car radio: pressing one
cancels the other and makes a new selection. Although Interlocked
Push Buttons function as a group, you must add them to the screen
one at a time.
When the operator presses an Interlocked Push Button, the
PanelView terminal places the button’s control value at the Button
Control address in the PLC and highlights the selected button.
The Interlocked Push Button remains highlighted as long as the PLC
value is the same as the value of the button. Therefore only one
button in the group is active and highlighted at any time.
If two or more Interlocked Push Buttons have the same control
value, both are highlighted whenever the associated Button Control
contains that value.
Note: If the Button Control value does not match any of the
Interlocked Push Buttons’ Control Values, an error state occurs and
no button is highlighted. An error state also occurs if the Button
Control is not assigned. In this case also, no button is highlighted.
You can use different groups of Interlocked Push Buttons on the
same screen, as long as each group uses a different Button Control.
Note: You can also add a single Interlocked Push Button to the
screen. When pressed, it sends its control value to the PLC. This acts
as a Set Value Button.
Important: For Remote I/O applications, and ControlNet Scheduled
tags, the PanelView terminal can retain the current
value for the button setting, even after the terminal is
turned off. Depending on how the Application Startup
operation is defined, the retained value (last state) or
initial value (default) is sent to the PLC when power is
reapplied.
For DH+ applications, ControlNet Unscheduled tags,
and Modbus applications, the current value cannot be
retained. Depending on how the Application Startup
operation is defined, the initial value or nothing
(default) is sent to the PLC when power is applied.
For details on configuring Application Startup
operation, see “Application Startup” in Chapter 5 of the
PanelView 1200e and 1400e Operator Terminals User
Manual.
Interlocked Push Button
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