5.
COMMUNICATION PROTOCOL
Use LG RS485 protocol (Open protocol). Contact LG representatives.
Computer or other hosts can be Master and inverters Slave. Inverter responds to Read/Write
command from Master.
5.1.
Supported command codes
Function Code
'R'
'W'
'X'
'Y'
(Important: Use ASCII CODE (Capital Letter).)
5.2.
BroadCast Function
Use it to send command to all inverters at the network.
All inverters respond when command is sent from Station # 255.
5.3.
Error Code
Error Code
ILLEGAL
FUNCTION
ILLEGAL DATA
ADDRESS
ILLEGAL DATA
VALUE
WRITE MODE
ERROR
FRAME ERROR
TIME OUT
ERROR
DPRAM OFF LINE
INVALID ID
NUMBER
UNDEFINED
CONDITION
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Display
IF
Invalid command received.
Invalid parameter address received.
IA
Monitor executed without resistoring monitor.
ID
Invalid data received.
WM
Read Only or not-programmable during run.
FE
Frame size, internal Num or Sum is different.
TO
DPRAM communication failed for the set time.
DO
DPRAM is Off-line.
IN
Different address received.
UC
Undefined condition received.
Name
Parameter Read
Parameter Write
Monitor Register
Monitor Execution
Description
6