Code standard = ASCⅡcode;
Code standard = hexadecimal.
8-bit no parity, 8-bit odd parity and 8-bit even parity are optional.
6.4.3.2. Datagram Format
Startup bit Address Command Data length Data domain Parity
1 bit 1bit 1 bit 1 bit Decided by the data
length
1 bit
Description：
Startup bit：0x7e (It is regular.)
Meter address：The range is 0x01-0x63.
Data length：The length of data domain
Parity：The lower bits of the summation from the start up bit to the last bit of the data domain
6.4.3.3. Instructions of Longtec Protocol
6.4.3.3.1. Read the Actual Weighing Value
Request：Master Response：Slaver
Domain name Data（hex） Domain name Data（hex）
Beginning code 7E Beginning code 7E
Function code 01 Function code 01
Length of data 0 Length of data 4
Checking Accumulation Weighing value
（MMSB）
The Description of Meter’s Status Word：
BIT0～BIT2 ：Decimal point, range：0～4；
BIT3 =1，updated， = 0, the data is invalid；
BIT4 =1，exceed the capacity，= 0, normal；
BIT5 =1，dynamic， = 0, static；
BIT6 =1，gross weight， = 0, net weight；
BIT7 =1，negative， = 0, positive.
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