LG Industrial Systems GLOFA GM6 Series, Руководство пользователя

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Chapter 13. Dedicated Cnet communication for GM6
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(3) Response format(for PLC ACK response)
Format name Header Station No. Command Register No. Tail Frame check
Frame(Ex.) ACK H10 X(x) H1F ETX BCC
ASCII value H06 H3130 H58(78) H3146 H03
• Station number, command and resister No. are the same as computer request format.
•
BCC : When command is one of lower case(x), only one lower byte of the value resulted by adding 1 Byte each
to ASCII values from NAK to ETX is converted into ASCII, added to BCC, and sent.
(4) Response format(for PLC NAK response)
Format
name
Header
Station
No.
Command Register No. Error code(Hex 2 Bytes) Tail Frame check
Frame
(Ex.)
ACK H10 X(x) H1F H1132 ETX BCC
ASCII
value
H06 H3130 H58(78) H3146 H31313332 H03
•
Station number, main commands, and resister No. are the same as computer request format.
•
BCC : When command is one of lower case(x), only one lower byte of the value resulted by adding 1 Byte each
to ASCII values from NAK to ETX is converted into ASCII, added to BCC, and sent.
•
Error code is hex and 2 Bytes(ASCII code, 4 Bytes), which indicates type of error. For the details, see Appendix
‘A2. Error Code Table’.
(5) Example of use
This supposes that the variable which data type of station No.’1’ is UINT and the variable name is “ASDF” is
monitor-registered with No.’1’.
(Computer request format)
Register format
Format
name
Head-
er
Stat-
ion No.
Comm-
and
Regist-
er No.
R##
Number
of blocks
Variable
length
Variable
name
Tail
Frame
check
Frame(Ex.) ENQ H01 X(x) H01 R0A H01 H04 ASDF EOT BCC
ASCII value H05 H3031 H58(78) H3031
H523
041
H3031 H3034
H4153444
6
H04