Shihlin electric SDE-100A2 User Manual

175
(c) Data packet structure
Byte sign
Name
Description
STX
Start code
“：”(ASCII code 3Ah)
ADR
Device number
1 byte is composed of 2 ASCII code bytes.
CMD
Command code
1 byte is composed of 2 ASCII code bytes.
DATA(n-1)
Data code
The length of n words is equal to the one of 2n bytes.(n<=29)
So, there are 4n ASCII code bytes.
………
DATA(0)
LRC
LRC check value
1 byte is composed of 2 ASCII code bytes.
End1
End code 1
“CR”(ASCII code 0Dh)
End0
End code 0
“LF”( ASCII code 0Ah)
Communication data formats are described below.
STX
“ : ” character
ADR
The address code is from 1 to 32. For example，the expression of number 18(hexadecimal 12h) is
divided into “1” and “2” in ASCII code. The address code 18 is expressed as 31h and 32h.
CMD and DATA
The DATA are varied according to different Command codes. To read 2 words which start address is
0100h from device number 1 as an example is described below.
Command code: 03h, read data
Command(host)： Response(slave)：
STX
:
STX
：
ADR
„0‟
ADR
„0‟
„1‟
„1‟
CMD
„0‟
CMD
„0‟
„3‟
„3‟
DATA
start address
„0‟
DATA
byte length
„0‟
„1‟
„4‟
„0‟
content of
address 0100h
„0‟
„0‟
„1‟
word length
„0‟
„0‟
„0‟
„2‟
„0‟
content of
address 0101h
„1‟
„2‟
„2‟
LRC
„F‟
„2‟
„9‟
„1‟
End1
0Dh
LRC
„C‟
End0
0Ah
„2‟
End1
0Dh
End0
0Ah

Shihlin electric SDE-100A2 Specifications

General

Brand	Shihlin electric
Model	SDE-100A2
Category	DC Drives
Language	English