Siemens SIMATIC S7-300 Module data Manual page 452

UN M 20.0
UN M 20.1
SPB END
U M 20.1
SPB WRT
//Create the memory for data transfer
L B#16#01
T MB
L B#16#02
T MB
L PEW
T MW
T MW
T MW
T MW
T MW
T MW
// Transfer the cold-spot temperature to AI 6 x TC
WRT: CALL "WR_REC"
REQ
IOID :=B#16#54
LADDR :=W#16#EE
RECNUM :=B#16#2
RECORD :=P#M 0.0 Byte 14
RET_VAL :=MW22
BUSY :=M20.1
U M 20.1
SPB END
CLR
= M
END: NOP 0
// Check the request: new cold spot temperature
// Check whether WR_REC is busy
// Skip, if no transfer is required
ist
//Check whether WR_REC is busy
// Transfer the temperature in hundredthsl
// of a degree (Pt100 climatic))
0
// Transer the temperature in Kelvin
1
128 // Read out the input address of the used channel
of
// the thermoresistor module
2 // for channel 0 of AI 6 x TC
4 // for channel 1 of AI 6 x TC
6 // for channel 2 of AI 6 x TC
8 // for channel 3 of AI 6 x TC
10 // for channel 4 of AI 6 x TC
12 // for channel 5 ofAI 6 x TC
:=M20.0
// Input address of AI 6 x TC
// Data record number must be set to 2
// Indicator for the memory for data
// Return value for SFC "WR_REC"
// Busy bit of SFC "WR_REC"
// check whether WR_REC is busy
20.0
// Request bit for data transfer
// transfer, 14 bytes long
// Reset request for cold-spot
// temperature