Rockwell Automation 2711-KA1_KC1_TA1_TA4_TC1_TC4 PanelView Terminals for DOS/Windows - Manual (Page 53)

PanelView 1200 Terminal Functions
Chapter 2
2-24
The PanelView 1200 terminal performs periodic fault detection tests while
on-line with the PLC controller.
PLC Communication Timeout
If communication between the PLC controller and PanelView 1200
terminal is interrupted, a special, flashing PLC Communication Lost status
window appears on the top line of the display.
The terminal will continue to operate, and operator-selected screens can be
displayed. Displayed PLC data will show the last values received before
PLC communications were lost.
Invalid Screen Request
If the operator or PLC controller requests a non-existent screen, a minor
fault message will appear pointing out the error. You will then have to
debug your application file and/or PLC program.
Application Data Checksum
The Application Data Checksum test periodically checks the application
file in battery-backed RAM. If the PanelView 1200 terminal fails this test,
the terminal enters Major Fault mode. You will need to download the file
again to correct this problem.
Battery Failure
The terminal’s battery is monitored once every minute. When the test
indicates battery failure, the PanelView 1200 terminal logs a minor fault.
Refer to the battery failure table on page 2-4 for more information.
The PanelView 1200 terminal can print:
application screens
alarms displayed in both the Alarm Status and Alarm History Screens
a log of alarm messages
The terminal can print on any serial IBM (or compatible) text printer. To
set the communications parameters for the printer, choose Serial Port, then
Choose List to bring up the list of printer parameters.
OnĆline Diagnostic Testing
PanelView 1200 Terminal
Printing