YOKO E1007, User Manual

Page: 15 / 45

第
9
页 共
35
页
2.2 Serial port instructions explain
Table 2.2-1 Data format of serial port instructions
Length
Message
Source
Message
target
Reserve Reserve Command beeper Check Sum
Table 2.2-2 Serial port instructions analysis
Field Format Sub-Field Description
Length 1 Byte Length
command length
，
not include
Check Sum
，
maximum 0xFF
Message
Source
1 Byte
0x04 = Host
（
PC or IPC
） ；
0x31 = Decoder
（
barcode scanner
）
Sources of command
Message
target
1 Byte
0x04 = Host
（
PC
机或工控机） ；
0x31 = Decoder
（
barcode scanner
）
command target address
Reserve 1Byte reserved
（
0x00
）
Reserve 1Byte reserved
（
0x00
）
Command
Variable
number of
bytes
Beeper 1 Byte
0x31 = open
0xFF = close
If the buzzer is open
Check Sum 2 Byte
Check sum of message
formatted as High byte low
byte
Remark
：
1
、
Check Sum
：
Complement of the command sum, high byte is ahead, low byte is behind.
Check calculation method: all bits(not including two check bits) sum up, then inverse the
result and plus 1
Example
：
Exit and save
（
0A 04 31 00 24 25 45 4E 44 FF
）
add up and equal
：
02 5E
，
Turn to binary
（
0000 0010 0101 1110
） ，
inverse calculate
：
1111 1101 1010 0001
，
add 1 and get
the check code
（
FD A2
） 。
2
、
W
hen the command below which format is character(without “0X”as prefix, if you want use
it as serial command, you need to converted them to ASCII which is Hexadecimal.