Siemens SIMATIC S5 CP 523 Manual page 203

CP 523
STL FB 200
Segment 3 006F
006F :
0070 :LW =Q-DB
0071 :SLW
0072 :SRW
0073 :
0074 :L KH E400
0076 :+F
0077 :LIR
0078 :
0079 :L KB 0
007A :!=F
007B :JC =FE03
007C :
007D :TAK
007E :ADD KF -2
0080 :LIR
0081 :ADD KF -5
0083 :T FW 254
0084 :
0085 :
0086 :LW =QANF
0087 :L KB 0
0088 :<F
0089 :JC =FE03
008A :
008B :TAK
008C :L KB 255
008D :>F
008E :JC =FE03
008F :
0090 :
0091 :L =QLAE
0092 :L KB 0
0093 :>F
0094 :JC =CONT
0095 :
0096 :LW =ENDZ
0097 :L KH 0000
0099 :>F
009A :JC =PAOK
009B :JU =FE03
009C :
009D CONT :
009E :L =QLAE
EWA 4NEB 811 6044-02a
8
7
0
0
Using the "SEND" and "Receive" Function Blocks
Explanation
Check whether Q DB available
Load Q DB parameter
Isolate DB number from
Q DB parameter
Calculate start address
of the Q DB using
the block address list
Q DB available?
" E R R O R "
Calculate the length of the Q DB
and buffer
Check the QANF
QANF less than 0 ?
" E R R O R "
QANF > 255 ?
" E R R O R "
Check QLAE
QLAE > 0 ?
" C O N T I N U E "
Check end-of-text,
characters for > 0 ?
"P A R A M E T E R S O.K."
otherwise "E R R O R "
QLAE > 128?
8-13