Siemens SIMATIC S5 Manual page 63

S5-95U, SINEC L2
Power ON and mode
selector at STOP
Program L2 interface in
DB1
LAN bus connector is
not plugged into L2
interface; switch mode
selector from STOP to
RUN (PLC cold restart)
PLC enters RUN mode?
Yes
BF LED bright?
No
Connect the PLC to the
LAN (plug LAN bus
connector into L2
interface)
BF LED bright?
No
Everything OK; station
is ready for communica-
tions on the LAN
Possibly
Evaluate
LAS_LIST_CREATE
( section 3.4.5)
Figure 3-6. Checklist Flowchart for Starting Up a System
EWA 4NEB 812 6112-02
No
DB1 contains error(s)
Yes
No L2 parameter block in
DB1
Yes
Basic parameters are not
consistent over the entire
network
Evaluate
TIME_TTH_READ
( section 3.4.8)
Start-Up, Tests, and Diagnostics
Switch PLC to STOP and
eliminate error in DB1
Switch PLC to STOP and
enter parameter block in
DB1
Evaluate MAC_EVENT (
section 3.4.9), then coordinate
the basic parameters of all
stations and switch the PLC
from POWER OFF to
POWER ON
3-9