LSIS XGL-C22A, Руководство пользователя, Страница: 117 / 299

Chapter 7 XGT Dedicated Communication
7-15
7.2.7 Registration and execution of monitor variable
(1) Registration of monitor variable (X##)
Monitor variables can be registered separately up to 32 (0 to 31) with Read instruction of actual variables through this
function, which executes the registered details by monitor instruction after the registration.
(a) XGT client: frame to register monitor variable
Structure Head
Station
no.
Instruction
Registration
no.
Registration
format
Tail Frame check
Frame ENQ 01 X(x) 09
Refer to
registration
format
EOT BCC
Hex h05 h3031 h58(78) h3039 Note 1) h04
(b) XGT server: response frame of monitor variable
▶
In case of ACK response
Structure Head Station no. Instruction
Registration
no.
Tail Frame check
Frame ACK 01 X(x) 09 ETX BCC
Hex h06 h3031 h58(78) h3039 h03
▶
In case of NAK response
Structure Head
Station
no.
Instruction
Registrati
on no.
Error code
(Hex 2 byte)
Tail Frame check
Frame NAK 01 X(x) 09 h1132 ETX BCC
Hex h15 h3031 h58(78) h3039 h31313332 h03
(c) Meaning of each item
Classification Description
Registration
no.
Up to 32 (0~31, H00~H1F) can be registered. If registered again with the already registered
number, the presently executed one will be registered
Registration
format
Available until EOT of instructions during format of reading single/continuous device
Note
Note 1) For registration format, select one between the following two formats.
▶
Reading single device
RSS
No. of block
(2 byte)
Variable length
(2 byte)
Variable name
(16 byte)
...
1 block (max. 16 block)
▶
Reading continuous device
RSB
Variable length
(2 byte)
Variable name
(16 byte)
No. of data