SANCH S3000 Series, User Manual

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Settings Function Settings Function
3 7, O, 1 for ASCII 12 8, N, 1 for RTU
4 7, E, 2 for ASCII 13 8, N, 2 for RTU
5 7, O, 2 for ASCII 14 8, E, 1 for RTU
6 8, N, 1 for ASCII 15 8, O, 1 for RTU
7 8, N, 2 for ASCII 16 8, E, 2 for RTU
8 8, E, 1 for ASCII 17 8, O, 2 for RTU
1
Computer-controlled Link: when the RS-485 series connection communication interface
is utilized, every S3000 has to pre-determine the communication address at Pr. 09-00,
and thereafter, the computer will proceed with the control based on respective
addresses.
1
The Communication Protocol is of the MODBUS ASCII (American Standard Code for
Information Interchange) Mode: every byte is composed of 2 ASCII words. For
example, if the numeric value is 64 Hex, the way to show it through the ASCII mode will
be ”64”, which is composed respectively be ”6” (36Hex) and
”4” (34Hex).
1. Meaning of Encoding:
The communication protocol is of the Hexadecimal system, and thus, the meaning of the
ASCII message words would be: ”0”…”9”, ”A”…”F”, which every Hexadecimal code
represents every ASCII message word.
For instance:
WORD ‘0’ ‘1’ ‘2’ ‘3’ ‘4’ ‘5’ ‘6’ ‘7’
ASCII code 30H 31H 32H 33H 34H 35H 36H 37H
WORD ‘8’ ‘9’ ‘A’ ‘B’ ‘C’ ‘D’ ‘E’ ‘F’
ASCII code 38H 39H 41H 42H 43H 44H 45H 46H
2. WORD Structure
2.1 10-bit Word Frame (For ASCll)