Siemens simatic c7-621 - Page 58

Program Example 04/99
58 Getting Started with C7-621-AS-i
Network 5 : Faults
O M21.1 // Fault_parcel sequence
O M21.2 // Fault_parcel stop
= M16.0 // Fault
A M16.0 // Fault
A M10.4 // Flashing frequency
= DB1.DBX6.1 // Red lamp on casing
A DB1.DBX2.1 // Acknowledgment button
R M21.1 // Fault_parcel sequence
R M21.2 // Fault_parcel stop
Network 6 : Data interface
L MW20 // Message flags
T DB46.DBW4 // Data block CPU_OP