Omron NT31 Series, Operation Manuals

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Responding to Displayed Error Messages
Section 11-2
11-2-5 Communication Errors and Their Remedies
This section describes the errors relating to communication that can occur during
operation, and their remedies.
Operation When a Communication Error Occurs
When a communication error occurs, the error message is displayed at the
NT31/NT31C, 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 Communication Errors Occur
When an error message is displayed, press the “OK” touch switch displayed on the
screen. The NT31/NT31C will return to the screen that was displayed before the
error occurred, and operation will restart.
Display of Communication Errors
For communication 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
S
Receive errors
The following errors can occur when receiving data.
- Parity error
- Framing error
- Overrun error
- FCS (sum value) error
- Time out error
- Data over flow error
- PC unit No. error (host link only)
- NAK received (in the case of the host link, the end code is also displayed)
- Undefined command error
S
Send errors
The following errors can occur when receiving data.
- Time out error
- Data over flow error