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