Delta Electronics ASDA-B2 series User Manual

Chapter 8 MODBUS Communications ASDA-B2
8-12 Revision September 2013
LRC Check
‘1’
‘3’
End 1 (0DH)(CR)
End 0 (0AH)(LF)
RTU Mode:
Command message: Response message:
Slave Address 01H Slave Address 01H
Function 10H Function 10H
Starting data
address
01H (Upper bytes)
Starting data
address
01H (Upper bytes)
12H (Lower bytes) 12H (Lower bytes)
Number of data
(In Word)
00H (Upper bytes)
Content of data
(In Word)
00H (Upper bytes)
02H (Lower bytes) 02H (Lower bytes)
Number of data
(In Byte)
04H
CRC Check Low E0H (Lower bytes)
CRC Check High 31H (Upper bytes)
Content of 1st data
0BH (Upper bytes)
B8H (Lower bytes)
Content of 2nd
data
00H (Upper bytes)
00H (Lower bytes)
CRC Check Low FCH (Lower bytes)
CRC Check High EBH (Upper bytes)
Please note that a silent interval of more than 10ms is required before and after data
transmission in RTU mode.
LRC (ASCII Mode):
LRC (Longitudinal Redundancy Check) is calculated by summing up, module 256, the
values of the bytes from ADR to last data character then calculating the hexadecimal
representation of the 2’s-complement negation of the sum.
Example
STX ‘:’
ADR
‘7’
‘F’
CMD
‘0’
‘3’
Starting data address
‘0’
‘5’
‘C’
‘4’
Number of data
‘0’
‘0’
‘0’
‘1’
LRC Check
‘B’
‘4’
VARITEL INGENIERIA ELECTRONICA S.A.
info@varitel.com - www.varitel.com - Tel. (54) 11-4243-1171 / Fax: (54) 11-4292-7545
Manuel Baliña 456, Lomas de Zamora (B1832CCJ) Buenos Aires, Argentina.

Delta Electronics ASDA-B2 series Specifications

General

Brand	Delta Electronics
Model	ASDA-B2 series
Category	Servo Drives
Language	English