Siemens KS7 Series Specifiche Scaricare il pdf (Pagina 224)

Using the ”SEND” and ”RECEIVE” Function Blocks CP 523

STL FB 201 Explanations

00EE :DO =Z-DB Open destination DB

00EF :

00F0 NBLO :JU OB 31*

(Retrigger scan time)

00F1 :L KH 0000 Access word 0 on CP 523

00F3 :DO FW 242 for transferring a message block

00F4 :T PY 0

00F5 :L FW 242

00F6 :I 1

00F7 :T FW 242

00F8 :L KH 0000

00FA :DO FW 242

00FB :T PY 0

00FC :

00FD :L FW 242

Set pointer back to

00FE :D 1 base address

00FF :T FW 242

0100 :

0101 :L FW 238

Decrement no. of message blocks

0102 :D 1 for Receive message frames

0103 :T FW 238 and store

0104 NWOR :

0105 :DO FW 234

Fetch a data word from CP 523

0106 :L PW 0

0107 :

0108 :DO FW 236

and store

0109 :T DW 0 in Z-DB

010A :

010B :L FW 238

Last message block?

010C :L KB 0

010D :><F

010E :JC =KEND

”N O”

010F :

0110 :L FY 246

Increment auxiliary register by 1

0111 :I 1

0112 :T FY 246

and store

0113 : (shows the number of the word

0114 : received in the last message block)

0115 :L FW 244 and compare with the number of words

0116 :<F in the last message block to see

0117 : if the last word was received

0118 :JC =KEND ”NO”

0119 :

011A :L FW 230

Increment ZLAE register by 1

011B :ADD KF +1

011D :T FW 230

and store

* In 115 CPUs only (if required)

8-34

EWA 4NEB 811 6044-02a

1 2 ... 219 220 221 222 223 224 225 226 227 228 229 ... 256 257

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Siemens KS7 Series Specifiche Pagina 224

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