LSIS sv-ig5a, Руководство пользователя

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11-3
11.5 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.
Code Description
Function
Code
0x03 Read Hold Register
0x04 Read Input Register
0x06 Preset Single Register
0x10 Preset Multiple Register
Exception
Code
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.
11.6 Communication protocol (LS BUS)

Basic format
Command message (Request):
Command message
(Request):
ENQ Drive No. CMD Data SUM EOT
1 byte 2 bytes 1 byte n bytes 2 bytes 1 byte
Normal response
(Acknowledge Response)
ACK Drive No. CMD Data SUM EOT
1 byte 2 bytes 1 byte n * 4 bytes 2 bytes 1 byte
Negative response
(Negative
Acknowledge
Response)
NAK Drive No. CMD Error code SUM EOT
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte
Description:
Request starts with
“ENQ” and ends with “EOT”.
Acknowledge Response starts with
“ACK” and ends with “EOT”.
Negative Acknowledge Response starts with
”NAK” and ends with “EOT”.
“Drive Number” is the number of drives and indicated in 2 bite ASCII-HEX.
(ASCII-HEX: Hexadecimal consists of
„0‟ ~ „9‟, „A‟ ~ „F)
CMD: Capital letter
Character ASCII-HEX Command
„R‟
52h Read
„W‟
57h Write
„X‟
58h Request for monitoring
„Y‟
59h Action for monitoring
Data: ASCII-HEX
Ex) when data value is 3000: 3000 (dec)
→
„0‟ ‟B‟ ‟B‟ ‟8‟h
→
30h 42h 42h 38h
For Service Call 800-848-2504
For Service Call 800-848-2504