Process interfacing via an automation system (PLC, PC)
10.4 Control with FB79
SIMATIC MV420 / SIMATIC MV440
276 Operating Instructions, 04/2013, A5E02371045-06
STL program
//Enter data ID (in principle only necessary in the first cycle)
L B#16#81 // Only result string
T QB 8
// Check number of data packet for 1
L IB 5 // Number of data packet from reader
L 1
<> I // If number does not equal 1
JC m001 // ... then there is not yet any user data
// Read user data from reader
L ID 9 // Read first 4 bytes of user data
T DB17.DBD 4 // Store in DB
L ID 13 // Read next 4 bytes of user data
T DB17.DBD 8 // Store in DB
L ID 17 // Read next 4 bytes of user data
T DB17.DBD 12 // Store in DB
L ID 21 // Read next 4 bytes of user data
T DB17.DBD 16 // Store in DB
L ID 25 // Read next 4 bytes of user data
T DB17.DBD 20 // Store in DB
L ID 29 // Read next 4 bytes of user data
T DB17.DBD 24 // Store in DB
L IW 33 // Read second last 2 bytes of user data
T DB17.DBW 28 // Store in DB
L IB 35 // Read last byte of user data
T DB17.DBB 30 / // Store in DB
// Acknowledge with no. of data packet
m001: L IB 5 // Number of data packet
T QB 5 // Send as acknowledgment to reader
BEU
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