LG Electronics 120S user manual Sum, Xor, Mul

Chapter 8 Communication Functions

•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
Rule		value.
	XOR 1	BCC method is OR (Exclusive OR).
Check
	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.
	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.
		H signifies header, S is for segment, and T is for tail.
	Range	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].
		It is to set whether not to take complement number or to take the complement number of 1 or 2 at
Complement		[BCC] value. If mask setting is done after taking a complement number, the user can set any value to
		do masking.
		Sets any value and method of masking.
	Mask	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

8-43