Omron EJ1 User Manual page 166

Frame Configuration
BCC Calculation Example
Note
Response Frame
End Codes
End code Name
0F FINS command error The specified FINS command could not be executed.
10 Parity error
11 Framing error
12 Overrun error
13 BCC error
14 Format error
16 Sub-address error
18 Frame length error
00 Normal completion
STX Unit No.
02H 30H 30H
BCC = 30H 30H 30H 30H 30H 30H
: XOR (exclusive OR) calculation
No response will be returned unless the frame contains all elements up to the
ETX and BCC.
Sub-address End code
STX Unit No.
02H
1 2
Meaning
The OR of 1 bits in received data does not match the setting
for the communications parity.
Stop bit is 0.
The next data was received when the reception data buffer
was full.
The calculated BCC value is different from the received BCC
value.
The FINS-mini command text contains characters other than
0 to 9 and A to F. For details on the echoback test, refer to
6-4-10 Echoback Test.
SID and the FINS-mini command text are not included.
The sub-address is not included.
The received frame exceeds the specified number of bytes.
Command processing was completed normally.
End Code Example
When the Sub-address, SID, and FINS-mini Command Text Are Not Included
• Command
Unit No.
STX ETX
02H 0 1 03H
• Response
Sub-address
STX Unit No.
02H 0 1 0
The sub-address is "00" and the end code is "16" (sub-address error).
Sub-address SID FINS-mini command text
30H 30H 30H 30H 35H 30H 30H 03H 36H
35H
Text
FINS-mini command text
0 0
2 2
BCC calculation range
BCC
End code ETX BCC
0 1 6 03H
Section 6-2
ETX BCC
30H 30H 03H = 36H
ETX BCC
03H
1 1
Error detection priority
8
2
1
3
5
7
6
4
None
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