LSIS XGL-C22A, Руководство пользователя, Страница: 113 / 299

Chapter 7 XGT Dedicated Communication
7-11
7.2.5 Writing the direct variable continuously (W(w)SB)
This function is used to write the data of the device continuously as long as specified from the specified address.
(1) Example of request frame that XGT client requests writing direct variable continuously.
Classification Head Station
no. Instruction
Instruction
type
Variable
Length
Variable
Name
No. of data Data Tail
Frame
Check
Frame ENQ 10 W(w) SB 06 %MW100 02 11112222 EOT BCC
Hex h05 h3130 h57(77) h5342 h3036
h254D5731303
0
h3034
h31313131
32323232
h04
(2) Example of XGT server response
(a) In case of ACK response
Classification
Head Station no. Instruction Instruction type Tail Frame Check
Frame ACK 10 W(w) SB ETX BCC
Hex h06 h3130 h57(77) h5342 h03
(b) In case of NAK response
Classification
Head Station
no.
Instruction Instruction type
Error code
(Hex 2 byte)
Tail Frame Check
Frame ENQ 10 W(w) SB 1132 ETX BCC
Hex h05 h3130 h57(77) h5342 h31313332 h03
(3) Meaning of each item
Classification Description
Variable name Start address of device to execute writing the direct variable continuously
No. of data
Number of data according to direct variable type
Namely, if data type is word and no. of data is 5, it means to write 5 words.
Max. no. of data is 120 byte in case of XEX, 240 byte in case of ASCII conversion.
(4) Example
Example that writes 2 bytes hAA15 at the D00001 of station number 1