Omron EJ1G, User Manual

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129
Frame Configuration
Section 6-2
BCC Calculation Example
Note No response will be returned unless the frame contains all elements up to the
ETX and BCC.
Response Frame
End Codes
■
End Code Example
When the Sub-address, SID, and FINS-mini Command Text Are Not Included
• Command
• Response
The sub-address is “00” and the end code is “16” (sub-address error).
=
02H 30H 35H 30H 30H 03H 36H
:
35H 03H = 36H
STX Unit No.
Sub-address SID FINS-mini command text ETX BCC
BCC
XOR (exclusive OR) calculation
30H 30H 30H 30H 30H
30H 30H 30H 30H 30H 30H 30H 30H
1
02H
2 2 1
03H
1 2
0 0
Text
STX Unit No.
Sub-address
End code
FINS-mini command text ETX BCC
BCC calculation range
End code Name Meaning Error detection priority
0F FINS command error The specified FINS command could not be executed. 8
10 Parity error The OR of 1 bits in received data does not match the setting
for the communications parity. 2
11 Framing error Stop bit is 0. 1
12 Overrun error The next data was received when the reception data buffer
was full. 3
13 BCC error The calculated BCC value is different from the received BCC
value. 5
14 Format error 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. 7
16 Sub-address error The sub-address is not included. 6
18 Frame length error The received frame exceeds the specified number of bytes. 4
00 Normal completion Command processing was completed normally. None
STX
02H
Unit No. ETX
03H
BCC
0 1
STX
02H
ETX
03H
BCC
0 1 0 0 1 6
Unit No. Sub-address End code