Omron C200HX Operation Manual page 478

Host Link End Codes
Errors without Responses
Error
Parity overrun or framing error during
command reception
A carriage return (CR) isn't received within
280 bytes.
A command is received that doesn't have the
@ character at the beginning of the first frame.
Incorrect node number
(Not the local node, hexadecimal, or over 31)
A Write command's intermediate frame or last
frame has only one or two bytes of data.
460
A response won't be received with some errors, regardless of the command.
These errors are listed in the following table.
The Communications Error Flag will be turned ON, an error code will
be registered, and receptions will be reset. (The error will be cleared
automatically if communications restart normally.)
SR 26407 (RS-232C Port Reception Overflow Flag) will be turned ON.
Communications return to normal when a normal command is
transmitted.
Receptions are reset.
The command is discarded and receptions are reset.
FCS error
Section 10-2
PC operation