Siemens SIMATIC C7-621 Manual page 28

Program Generation
Programming of the FC2 is now complete. The module can be saved and transferred to the CPU.
Now you must also consider the possible faults in your belt control. In the SIMATIC Manager open the
FC1. Insert the program line AN M16.0 in Network 1 . The complete network then looks like this:
Network 1 : Initial position
AN DB1.DBX0.0
AN DB1.DBX1.0
A DB1.DBX0.1
AN M16.0
= M15.0
In Network 3 insert the program line O M16.0 so that the conveyor belt will be deactivated if a fault
occurs.
Network 3 : Belt OFF
A DB1.DBX2.3
O M16.0
R DB1.DBX4.0
Save the function FC1 and overwrite the block in the CPU by reloading.
Finally, the organization block OB1 must be adjusted. In the SIMATIC Manager open the OB1 , insert
a network and call the function FC2 .
Network 3 : FC 2 call
Call FC2
Save the OB1 and overwrite it in the CPU by reloading.
To save the PLC program in the C7-CPU so that it is powerfail-proof, you must transfer it to the C7-CPU
flash memory. How to do this is described in the following section.
28
// Opto_Bero: no parcel
// Position switch: no parcel
// Ejector in initial position
// No fault
// Initial position
// Belt_OFF switch on casing
// Belt OFF
// Output Belt_ON
Getting Started with C7-621-AS-i
04/99