Siemens SIMATIC S5 Manual page 299

IP 266
9.4.1 Cold S5-100U Restart
Before you can work with the IP 266 following a cold S5-100U restart, you must
wait for completion of the module's runup phase. You must program the waiting
time in OB 22, which executes after every "Power OFF/Power ON". The pro-
grammed waiting time must be at least 3 seconds.
START
Call wait loop
FB 27
END
START
Set timer
Timer 0
no
Reset and enable
timer
END
EWA 4NEB 812 6057-02
OB 22
Call the delay time FB.
JU
NAME DELAY
BE
FB 27 NAME:DELAY
Force RLO = 1 and load timer with 3 s
JC
M1 L
SD
Time-out after 3 s
yes
SCHL AN
JC
Reset timer and enable with RLO = 0
A
R
A
L
SD
BE
STEP 5 Programming
FB 27
=M1
KT 300.0
T 0
T 0
=SCHL
T 0
T 0
T 0
KT 001.0
T 0
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