LiteOn EVO 6800 Series - Page 241

241
‘F’
‘4’
LRC Check
‘1’
‘2’
END
CR
LF
RTU Scheme:
Command Message:
Respond Message:
ADR
01H
ADR
01H
CMD
10H
CMD
10H
Starting Address
08H
Starting Address
08H
(Word)
80H
(Word)
80H
Data Quantity
(Word)
Data Quantity (Byte)
00H
02H
04H
Register Written Quantity
(Word)
00H
02H
First
00H
CRC Check High
42H
Storage Register
3CH
CRC Check Low
40H
Second
00H
Storage Register
32H
CRC Check High
DDH
CRC Check Low
D6H
during a communication error
When a error occurs during communication with the drive, the drive responds to the error
code, set the highest-order byte (bit7) of command data to 1 (Function code AND 80H) and
respond to the master system to inform master system about the error. And the drive keypad
displays CE-XX (XX is the error code) as the warning message.
Example:
ASCII Scheme:
RTU Scheme:
STX
‘:’
Address
01H