Omron Programmable Terminals NT631C - Manual (Page 250)

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Responding to Displayed Error Messages Section 7-2
7-2-5 Communications Errors and Their Remedies
This section describes the errors relating to communications that can occur
during operation, and their remedies.
Operation When a
Communications Error
Occurs When a communications error occurs, the error message is displayed at the
NT631/NT631C, and the buzzer sounds, provided the setting made for Buzzer
Sound in the System Menu is other than OFF. An error message is displayed
provided the setting for the Comm. Auto-Return memory switch is not ON
(note that some error messages are displayed even if the setting is ON).
Operation When
Communications Errors
Occur When an error message is displayed, after removing the cause of the error,
press the OK touch switch displayed on the screen. The NT631/NT631C will
return to the screen that was displayed before the error occurred, and opera-
tion will restart.
Display of
Communications Errors For communications errors, the name of the port at which the error occurred,
the error classification (send or receive error), the details of the error, the
probable cause, and the remedy, are displayed as shown below.
Example:
Parity error at serial port A
Receive Errors
The following errors can occur when receiving data.
• Parity error
• Framing error
Unable to download System Pro-
gram. - A communications error
occurred during downloading of
the system program.
- Illegal data has been written
into the screen data memory.
- Hardware fault, or flash memory
(memory for storing the system
program) has reached its life.
Select Download System Program and download
the system program again (6-5-2 Clearing/Install-
ing the System Program, page 145)
Also refer to 7-2-3 Errors Occurring on Screen
Data Initialization and Transmission (page 232),
and take the corrective action described for tool
transmission errors.
If this does not solve the problem, contact your
OMRON service center.
Unable to write System Settings. Hardware fault, or flash memory
(memory for storing the system
program) has reached its life. If the same message is displayed on repeating
writing of system settings several times, contact
your OMRON service center.
If writing is normally terminated after the error
message was once displayed, the Memory
Switch setting for system program may have been
altered. In such a case, check and reset the set-
ting in the Memory Switch menu of the Mainte-
nance mode.
Unable to erase Screen Data. Hardware fault, or flash memory
(memory for storing the system
program) has reached its life. If the same message is displayed on repeating
screen data deletion several times, contact your
OMRON service center.
Message Cause Remedy