E-880CM-1-E
7. ABOUT BCC / SUMCHECK
A check data may be added to the message at the communication setup menu in the SYS mode.
①
BBC check
This data can be determined by exclusive ORing (XOR) all characters from next "STX" through "ETX"
in the message below.
Example: Remote (keystrokes unacceptable)
6BH = 30H XOR 31H XOR 46H XOR 30H XOR 53H XOR 4DH XOR 30H XOR 31H XOR 03H
②
Sumcheck
This data can be determined by the last 8-bit data of the sum of bytes from next "STX" through "ETX"
in the message below.
Example: Remote (keystrokes unacceptable)
6BH = 30H XOR 31H XOR 46H XOR 30H XOR 53H XOR 4DH XOR 30H XOR 31H XOR 03H
STX
STX
F 0
F 0
ETX
CR LF
0 1
0 1
0 1
6 B
0 0
02 30 31 46 30 53 4D 30 31
36 42
03
0D 0A
ETX
CR LF
03
0D 0A
02 30 31 46 30 30 30
7 4
37 34
STX
STX
S M
S M
ETX
BCC
CR LF
ETX
BCC
CR
LF
HEX
HEX
STX
STX
F 0
F 0
ETX
CR LF
0 1
0 1
0 1
6 B
0 0
02 30 31 46 30 53 4D 30 31
36 42
03
0D 0A
ETX
CR LF
03
0D 0A
02 30 31 46 30 30 30
7 4
37 34
STX
STX
S M
S M
ETX
SUM
SUM
CR LF
ETX
CR
LF
HEX
HEX
Client
No.
Host
No.
Func.
code
Client
No.
Host
No.
Func.
code
Host system
PC, etc.
Client system
EL4001
Host system
PC, etc.
Client system
EL4001
Host system
PC, etc.
Client system
EL4001
Host system
PC, etc.
Client system
EL4001
Client
No.
Host
No.
Res-
ponse
Client
No.
Host
No.
Res-
ponse