LSIS XGL-C22A, Руководство пользователя, Страница: 116 / 299

Chapter 7 XGT Dedicated Communication
7-14
(4)
Example
Example that reads two words from M000 of station no. 10(h0A)
(We assume that the following data is included.)
M000 = h1234
M001 = h5678
(a) XGT client: Request frame to read continuously
Classification Head Station
no.
Instruction Instruction type Variable Length
Variable
Name
No. of data Tail
Frame
Check
Frame ENQ 0A R(r) SB 06 %MW000 02 EOT BCC
Hex h05 h3041 h52(72) h5342 h3036
h254D30
3030
h3032 h04
(b) XGT server: response frame
▷
In case of ACK response
Classification Head Station
no.
Instruction Instruction type No. of data Data Tail
Frame
Check
Frame ACK 0A R(r) SB 04 12345678 ETX BCC
Hex h06 h3041 h52(72) h5342 h3034 h3132333435363738 03
▷
In case of NAK response
Classification Head Station
no.
Instruction
Instruction type
Error code Tail
Frame
Check
Frame NAK 0A R(r) SB Error code (2 byte) ETX BCC
Hex h15 h3041 h52(72) h5342 Error code (4 byte) h03