Rules Governing the Use of the S5-115F
S5-115F Manual
Figure 10-5. SINEC L1 Response Time
Activate operating
system for Send
Synchr.
interval
e.g.
100 msec.
Read Receive mailbox
via user program
Synchr.
int. e.g.
100 msec.
Receive S5-115F
Receive
Polling time
e.g. 250 msec.
Send
Fill Send
mailbox
Send S5-115F
SINEC L1 LAN
Fill Receive mailbox
via operating system
T
SINEC response
Explanation of Figure 10-5
Figure 10-5 describes a typical data exchange via SINEC L1.
The Send S5-115F enters the data in the Send mailbox of the desired data path.
The operating system attempts to buffer the message.
The message is sent from the buffer before the SINEC L1 polling time has elapsed (at the
latest).
Please make sure the polling list is properly organzied.
The Receive mailbox is filled in the receiving PLC at the next synchronization call.
The user program reads the data out of the Receive mailbox.
This results in the following in error-free operation:
T
SINEC L1 response time
T
synchr. S
+ T
SINEC poll
+ T
synchr. R
+ T
PLC cycle time R
10-6
EWA 4NEB 811 6148-02
