The PanelView 550 printer port is usually used to send a "copy" of an alarm message out the port to a hardcopy printer.
But there is also a "Print Only Object" you can configure in PanelBuilder32.
It works like an alarm, where it monitors a trigger value in the PLC and sends the configured alarm string when the trigger changes state.
I haven't used them in a while, but that's the basic direction to investigate.