Salicru CV30 User Manual page 109

Low bit of data 0004H
High bit of data 0005H
Low bit of data 0005H
Low bit of CRC
High bit of CRC
END
The RTU response command is:
START
ADDR
CMD
High bit of write data
Low bit of write data
High bit of data number
Low bit of data number
Low bit of CRC
High bit of CRC
END
7.3.2 ASCII mode
7.3.2.1 Command code: 03H (0000 0011), read N words (Word) (max. number for
continuous reading is 16 words)
For instance: As for the inverter whose slave address is 01H, the starting address of internal storage is 0004,
read two words continuously, the structure of this frame is listed as below:
ASCII master command message (the command
sent from the master to the inverter
START
ADDR
CMD
High bit of starting address
Low bit of starting address
High bit of data number
Low bit of data number
Communication protocol
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ASCII slave response message (the message sent
':'
'0'
'1'
'0'
'3'
'0'
'0'
'0'
High bit of data address
'4'
'0'
Low bit of data address
'0'
'0' High bit of data address
88H
00H
32H
C5H
6EH
02H
10H
00H
04H
00H
02H
C5H
6EH
from the inverter to the master)
START
ADDR
CMD
Byte number
0004H
0004H
':'
'0'
'1'
'0'
'3'
'0'
'4'
'1'
'3'
'8'
'8'
'0'
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