Delta C2000 Series User Manual page 551

Chapter 12 Description of Parameter SettingsC2000
ASCII Mode
Command Message:
STX
ADR 1
ADR 0
CMD 1
CMD 0
Target register
Number of register
(count by word)
Number of register
(count by byte)
The first data content
The second data content
LRC Check
END
RTU mode:
Command Message:
ADR
CMD
Target register
Number of register
(Count by word)
Quantity of data (byte)
The first data content
The second data content
CRC Check Low
CRC Check High
Check sum
ASCII mode:
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.
Example:
01H + 03H + 21H + 02H + 00H + 02H = 29H, the 2's-complement negation of 29H is D7H.
':'
'0'
'1'
'1'
'0'
'0'
'5'
Target register
'0'
'0'
'0'
'0' Number of register
'0' (count by word)
'2'
'0'
LRC Check
'4'
'1'
'3'
'8'
'8'
'0'
'F'
'A'
'0'
'9'
'A'
CR
LF
01H
10H
05H
Target register
00H
00H Number of register
02H (Count by word)
04 CRC Check Low
13H CRC Check High
88H
0FH
A0H
'9'
'A'
12.1-09-6
Response Message
STX
ADR 1
ADR 0
CMD 1
CMD 0
END
Response Message:
ADR
CMD
':'
'0'
'1'
'1'
'0'
'0'
'5'
'0'
'0'
'0'
'0'
'0'
'2'
'E'
'8'
CR
LF
01H
10H
05H
00H
00H
02H
41H
04H