Rockwell Automation 2711E-ND1 PanelBuilder 1400E Reference Manual - Manual (Page 96)

90 Push Buttons
Publication 2711E-820 – January 1998
Important: In Remote I/O applications, depending on how the
Application Startup screen is configured, the PanelView
terminal can retain the current value for the button
setting even after the terminal is turned off. For this
reason, don’t use a Maintained Push Button to initiate a
PLC-controlled machine or process. Instead use a
Latched or Momentary Push Button.
Configuring the Maintained Push Button
Configure the Maintained Push Button according to the following
table:
Field Meaning
Name Assign a name, up to 15 characters to document the object for
printed reports. This increases the application’s size by 1 byte
per character.
Button Type Specify a Maintained Push Button.
Function Key
(Keypad only) Specify which function key the operator must press to activate
this button.
Number of States Only two states are possible. You cannot change this number.
Initial State You can assign either state to be the button’s initial state. This
state’s value will be written to the Button Control when the
application is run for the first time. This value will override the
control’s initial value.
You don’t need to assign any state as the initial state. You can
instead assign the button’s initial state to be blank. If you do, the
object will write the tag’s initial value to the Button Control.
Edit States If you wish, you can edit the values of each state. For example,
you could assign 100 to state 0, 200 to state 1.
To change the state values, choose Edit States. You can assign
any unique value from –2,147,483,648 to 2,147,483,647. See
“Configuring Object States” in Chapter 9, Creating Objects, in
the PanelBuilder 1400e Configuration Software for Windows
User Manual for more information.
Note: To minimize the size of the application file, use state
values that increment by one for each state. Do not configure
more states than you need.
Control The Maintained Push Button uses the following controls:
Button Control records the status of the button. You can
assign only a tag to this control.
When the button is first pressed, the control is set to the value
of the state not configured as the initial state. This value
remains until the button is pressed a second time, resetting the
control to the initial state value.
The button is aware of external control value changes. If the
Button Control value changes to one that does not match any of
the state values, the next button pressed sets the button to
state 0.
RIO