Siemens OP5 Equipment Manual page 112

Commissioning
16.2 Start-up Behavior
Self test
OP starts up
No configuration
or did you press
key combination?
No Yes
Download mode
Initialization
Establish connection to PLC
Message level
16-4
After the power supply has been turned on, the OP performs a self
test.
In the test, it checks the operability of the most important device
components and displays the test results.
If there is not a configuration on the OP, the OP switches automati-
cally to Download mode.
The OP then performs various internal initializations.
In this start-up phase, the OP attempts to establish a connection to
the PLC.
If communication is not possible – for example, because the cable
to the PLC has not been inserted – the OP displays a system mes-
sage.
After start-up, the OP is at message level.
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618