參數(shù)資料
型號(hào): VFD-L
廠商: Electronic Theatre Controls, Inc.
英文描述: User Manual
中文描述: 用戶手冊(cè)
文件頁(yè)數(shù): 9/16頁(yè)
文件大?。?/td> 489K
代理商: VFD-L
8
‘2’
‘0’
‘2’
‘2’
‘1’
‘0’
Number of data
(byte)
‘4’
‘1’
‘7’
‘7’
‘0’
‘0’
‘0’
‘0’
‘0’
‘7’
‘1’
‘0’
‘0’
‘0’
‘0’
Starting data
address
‘2’
Content of
starting data
address
2102H
Data address
‘1’
Data address
‘1’
‘0’
‘0’
‘0’
‘2’
‘D’
‘7’
CR
LF
‘1’
‘7’
‘7’
‘0’
“5’
‘1’
CR
‘1’
‘7’
‘7’
‘0’
‘5’
‘1’
Number of
data
(Count by
word)
LRC CHK 1
LRC CHK 0
END 1
END 0
Content of data
address 2103H
Data content
Data content
LRC CHK 1
LRC CHK 0
LRC CHK 1
LRC CHK 0
LRC CHK 1
LRC CHK 0
CR
CR
END 1
END 0
LF
END 1
END 0
LF
END 1
END 0
LF
CHK (check sum)
LRC (Longitudinal Redundancy Check) is calculated by summing up the values of the
bytes from ADR1 to last data character then calculating the hexadecimal representation
of the 2’s-complement negation of the sum. For example, using the command message
of above:
STX
‘:’
‘0’
ADR 1
ADR 2
‘1’
‘0’
CMD 1
CMD 2
‘3’
‘2’
‘1’
‘0’
ADDRESS
‘2’
‘0’
‘0’
‘0’
DATA
‘2’
‘D’
LRC CHK 1
LRC CHK 0
‘7’
CR
END 1
END 0
LF
STARTING DATA
NUMBER OF
01H+03H+21H+02H+00H+02H=29H, the
2’s-complement negation of 29H is D7H.
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