Siemens SIMATIC S5-95F - Coordinating Failsafe Data Interchange in the User Program

S5-95F S5-95F on SINEC L1
13.3.2 Coordinating Failsafe Data Interchange in the User Program
Once all parameters have been initialized, the user program for data interchange must be written.
This program must access coordination info in the User Valid Byte (refer to Figure 13-10).
Figure 13-10. Data Interchange Between Transmitter and Receiver (Principle)
Internal RAM memory
a a a a a a a a a a a a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a a a a a a a a a a a a
DB252
or
DB253
a a a a a a a a a a a a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a
a a a a a a a a a a
a
a a a a a a a a a a a a
DB252
or
DB253
Internal RAM memory
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
Transmitter (source)
a a a a a a a a a a a a a
a a a a a a a a a a a a a
a a a a a a a a a a a a a
a a a a a a a a a a a a a
L1 bus
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Receiver (destination)
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Receive mailbox
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Send mailbox
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Control program for
data interchange
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
User Valid Byte
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Receive mailbox
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Send mailbox
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Control program for
data interchange
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a
User Valid Byte
EWA 4NEB 812 6210-02 13-15