Siemens SIMATIC S5 Manual page 301

IP 266
START
yes
IP synchron-
ized?
no
yes
IP synchron-
ized?
Reset output
(indicator)
Aux. flag
yes
set AND IP synchon-
ized in bit 0?
END
EWA 4NEB 812 6057-02
OB 1
Call FB for IP 266 synchronization via
mode 99 in dependence on the status
bits in the input message.
Set auxiliary flag
Call FB 10
NAME
FB 10
Set output if IP not synchronized
Set output
(indicator)
The FB for selecting the mode can be
invoked when the IP 266 has been
synchronized.
NAME
Call FB 26 for
machining
FB 26
STEP 5 Programming
AN I 66.0
S F 5.0
JC FB 10
MO99
AN I 66.0
= Q 2.1
A F 5.0
A I 66.0
JC FB 26
AXIS1
BE
9-13