Omron NT631 Series Reference Manual page 395

Commands/Responses
Function
386
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01 : Invalid command
A non-exist command has been used.
02 : Command length error
The command length differs from the stipulated length.
03 : Range error
The word/table number is outside the setting range.
04 : Check sum present/absent specification error
A value other than those stipulated has been set for the check
sum present/absent specification.
05 : Format error
A format other than that stipulated has been used, for example
the word number has been specified with 5 digits or a character
code outside the permissible range has been used.
06 : Re-send request error
A re-send request command has been issued although there is
no input notify command to re-send.
10 : Check sum error
The specified sum value and calculated sum value differ.
This error code is returned also when the PT operation mode
switching command is issued when the PT is communicating to
the host at serial port B.
11 : Communication error
A parity error, overrun error, or framing error has occurred.
(This error code is only issued when Comm. Auto-return
memory switch is ON. )
s , s : Check sum (2 hexadecimal digits)
1 2
If there is an error in a command received by the PT, an error code is notified to
the host. The command in which the error occurred is invalidated.
Section 4-3