LG GLOFA-GM Series User Manual page 195

Chapter 7 Communication function
1 PI Creation MCN, MCD)
This is a function to create PI which can operate PLC. This command can be executed in the state that PI does
not exist in PLC and Domain(PLC Program) has been downloaded.
1) Request format(PC -> PLC)
Format
Header
Name
Frame (Ex.) ENQ
ASCII value H05
PI_N_LEN is where the number of PI name's characters is displayed.
PI_N_NAME is where PI name is located..
When PI name is executed as specified, the max.number of characters is 16.
If no name is required, use D instead of N in command type. If D has been used, PI_N_LEN and
PI_N_NAME are unnecessary.
PI_N_NAME shall be the name to specify or default name of 'P_Program'.
BCC : When command is one of lower case(m), only one lower byte of the value resulted by adding 1 byte
each to ASCII values from ACK to ETX is converted into ASCII, added to BCC, and sent.
DM_NAME shall be the name at that time when downloaded or default name of 'P_Domain'.
PI_N_LEN and DM_LEN are allowable within H01 - H10.
2) Response format(for PLC of ACK response)
Format
Name
Frame (Ex.)
ASCII value
Station number, commands, and type of command are the same as in computer request format.
BCC : When command is one of lower case(m), only one lower byte of the value resulted by adding 1 byte
each to ASCII values from ACK to ETX is converted into ASCII, added to BCC, and sent.
Station Command
Command
No.
H10 M(m)
H4D
H3130
(6D)
Header Station No.
ACK H10
H06 H3130
PI_N_LEN PI_N_NAME
type
CN H08 LGIS_PLC
H4C474953
H434E H3038
5F504C43
Command Command type
M(m) CN
H4D(6D) H434E
7-76
Tail
DM_LEN DM_NAME
EO
H06 PRGRAM
T
H505247 H0
H3036
524D 4
Tail Frame check
ETX BCC
H03
Frame
check
BCC