Siemens SIMATIC S5 CP 523 Manual page 208

Using the "SEND" and "Receive" Function Blocks
STL FB 200
0156 :L FW 242
0157 :><F
0158 :JC =VORB
0159 :
015A :A F 237.0
015B :JC =END
015C :
015D :L FW 244
015E :ADD KF +1
0160 :T FW 244
0161 :
0162 :JU =BLOC
0163 :
0164 VORB :
0165 :L FW 250
0166 :D
0167 :T FW 250
0168 :
0169 :L FW 246
016A :D
016B :T FW 246
016C :JU =WORT
016E :
016F :
0170 :
0171 :
0172 :
0173 :
0174 TELE :
0175 :
0176 :L FW 240
0177 :SLW 2
0178 :L =QLAE
0179 :-F
017A :T FW 248
017B :
017C :L KH 0004
017E :L FW 248
017F :-F
0180 :T FW 248
0181 :
0182 NBLO :
0183 :L FW 240
0184 :D
8-18
2
1
1
Explanation
transferred?
"Preparations" for next message block
Did this message block contain the end-
of-text character?->"END"
Increment QANF register by 1
and store
"NEXT MESSAGE BLOCK"
Decrement current CP 523
address by 2
and store
Decrement data word index
register by 1
and store
"NEXT WORD"
****************************
SEND WITH FIXED FRAME
*
LENGTH
*
****************************
Compute frame remainder register:
Number of message blocks * 4
(number in words)
Buffer number of words
Subtract message frame length from
number of message frames (in words)
and store
----------------------------
Decrement number of message blocks by 1
CP 523
*
*
EWA 4NEB 811 6044-02a