C-4
VS1MD User Manual
C.5 Communication Protocol (MODBUS-RTU)
Use Modbus-RTU protocol (Open protocol).
Computer or other hosts can be Master and inverters Slave. Inverter responds to
Read/Write command from Master.
C.6 Communication Protocol (LS Bus)
C.6.1 Basic Format
Command message (Request):
Normal response (Acknowledge Response):
Negative response (Negative Acknowledge Response):
Table C.1 – Supported function codes
Function code
Description
0x03
Read Hold Register
0x04
Read Input Register
0x06
Preset Single Register
0x10
Preset Multiple Register
Table C.2 – Exception codes
Function code
Description
0x01
ILLEGAL FUNCTION
0x02
ILLEGAL DATA ADDRESS
0x03
ILLEGAL DATA VALUE
0x06
SLAVE DEVICE BUSY
User
define
0x14
1.Write Disable (Address 0x0004 value is 0).
2.Read Only or Not Program during Running.
ENQ
Drive No.
CMD
Data
SUM
EOT
1 byte
2 bytes
1 byte
n bytes
2 bytes
1 byte
ACK
Drive No.
CMD
Data
SUM
EOT
1 byte
2 bytes
1 byte
n * 4 bytes
2 bytes
1 byte
NAK
Drive No.
CMD
Error code
SUM
EOT
1 byte
2 bytes
1 byte
2 bytes
2 bytes
1 byte
Содержание VS1MD
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