Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 272)

The Objects
Chapter 10
10-7
if you assign just the Button Control Address and assign text and
attributes to state 0, the border on the button will highlight when you
press the button, but the button itself will remain unchanged
if you assign the same address to the Button Control bit and Indicator
State bit, and assign different text and attributes to state 0 and 1, then the
button will immediately change to state 1 when you press the button
you can provide a visual handshake with the PLC controller by
assigning a PLC input address to the Button Control Bit and a PLC
output address to the Indicator State Address. By programming the PLC
controller to turn the Indicator State bit on when the Button Control bit
is set, the button will change to state 1
IMPORTANT: The Latched Push Button is not retentive or presettable. It
does not retain its value when power is switched off and on again, or when
the terminal is switched to Configuration mode and then back to Run
mode.
Maintained Push Button
Pressing a Maintained Push Button, (also known as Push-On, Push-Off)
sets the corresponding PLC Button Control bit to 1. The bit remains set
even after the button is released. You must press the button a second time
to reset the bit to 0.
The Maintained Push Button controls the value at the Button Control
address, a PLC input address. In addition, this object has an Indicator State
address used to define the display state of the object. The Maintained Push
Button has two display states, 0 and 1. You can use this feature to
configure the button in a number of ways:
if you assign just the Button Control address and assign text and
attributes to state 0, the border on the button will highlight when you
press the button, but the button text itself will remain unchanged.
if you assign the same address to the Button Control address and
Indicator State address, and assign different text and attributes to state 0
and 1, then the button will immediately change to reflect the new state
when you press the button.
to provide a visual handshake with the PLC controller, assign a PLC
input address to the Button Control address and a PLC output address to
the Indicator State address. Program the PLC controller to turn the
Indicator State bit on when the Button Control bit is on, and the button
will change to state 1