Chapter 8 Communication Functions
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• BCC setting: set BCC when it is needed.
Item Contents
Data Type ASCII adds 2 bytes BCC value in ASCII type to frame. Hex adds 1 byte BCC value in Hex type to
frame. For the detailed setting BCC, refer to 8.1.6 “Execution of Commands”.
Default It is that sum all the data from 2nd data to the data before the data marked as [BCC] and input the
result to the [BCC] area
SUM 1 BCC method uses sum like defaults, but the user can set the BCC area.
SUM 2 BCC method is the same with SUM 1, but it’s used when the user masks any value to the last BCC
value.
XOR 1 BCC method is OR (Exclusive OR).
XOR 2 BCC method is the same with XOR 1, but it’s used when the user masks any value to the last BCC
value.
MUL 1 BCC method is MULTIPLY that is, multiplication.
Check Rule
MUL 2 BCC method is the same with MUL 1, but it’s used when the user masks any value to the last BCC
value.
Range
H signifies header, S is for segment, and T is for tail.
Ex1) When header is set as [ENQ][STX], tail is set as [EOT][ETX], and the range of setting
BCC is to be from [STX] to [ETX], then set as H [1]~T [1].
Complement
It is to set whether not to take complement number or to take the complement number of 1 or 2 at
[BCC] value. If mask setting is done after taking a complement number, the user can set any value to
do masking.
Mask
Sets any value and method of masking.
Ex1) When masking by XOR method, using a value, HFF : ^FF
Ex2) When masking by OR method, using a value, HFF : |FF
When masking by AND method, using a value, HFF : &FF