Chapter 2
2-4
CompoWay/F Communications Procedures
■ Response Frame
Normal Completion
Error Completion
• An end code is returned for each command frame received that was addressed to the local node.
• No response will be returned unless the frame contained all elements up to the ETX and BCC.
• The “Error Detection Priority” indicates the priority when two or more errors occur simultaneously.
End code Name Description Error detection priority
00 Normal completion The command ended normally without error. None
End code Name Description Error detection priority
0F FINS command
error
• The specified FINS command could not be exe-
cuted.
• The FINS response code should indicate why
the command could not be executed.
8
10 Parity error The sum total of bits whose received data is “1”
does not match the set value of the communica-
tions parity bit.
2
11 Framing error Stop bit is “0.” 1
12 Overrun error An attempt was made to transfer new data when
the reception data buffer was already full.
3
13 BCC error The calculated BCC value is different from the
received BCC value.
5
14 Format error • The command text contains characters other
than 0 to 9 and A to F. This error does not apply
to Echoback Tests.
(Refer to Echoback Test on page 2-12 for
details.)
• There was no SID and command text.
• “MRC/SRC” not included in command text.
7
16 Sub-address error • Illegal (unsupported) sub-address.
• There was no sub-address, SID, and command
text.
• The sub-address was less than two characters,
and there was no SID and command text.
6
18 Frame length error The received frame exceeds the specified (sup-
ported) number of bytes.
4
STX
12
Node
number
Sub-
address
End code BCCCommand text
22 11
ETX00
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