Omron C200HX Operation Manual page 473

Host Link Errors
End Contents
code
16 Command not supported
18 Frame length error
19 Not executable
23 User memory write-protected
A3 Aborted due to FCS error in trans-
mit data
A4 Aborted due to format error in
transmit data
A5 Aborted due to entry number data
error in transmit data
A8 Aborted due to frame length error
in transmit data
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 is divided, but an
intermediate frame or the last frame has only
one or two bytes of data.
Probable cause
The operand specified in an SV
Read or SV Change command does
not exist in the program.
The maximum frame length of 132
bytes was exceeded.
(If the frame exceeds 280 bytes, the
Reception Overflow Flag will be
turned ON and there won't be a re-
sponse.)
Items to read not registered for
composite command (QQ).
Pin 1 on C200HX/HG/HE DIP
switch is ON.
An FCS error occurred in the se-
cond or later frame.
The command format did not match
the number of bytes in the second
or later frame.
There was a data error in the se-
cond or later frame.
The length of the second or later
frame exceeded the 132-byte max.
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 will return to normal when a normal command is
transmitted.
Receptions are reset.
The command is discarded and receptions are reset.
FCS error
Corrective measures
Check the command and program.
Check the command and divide it
into multiple frames if necessary.
Execute QQ to register items to
read before attempting batch read.
Turn OFF pin 1 of the CPU Unit's
DIP switch.
Check the FCS calculation method.
If there was influence from noise,
transfer the command again.
Check the format and transfer the
command again.
Correct the data and transfer the
command again.
Keep frames to 132 bytes or fewer.
PC operation
Section 9-6
455