Startup Behavior - Siemens simatic hmi op27 Equipment Manual

Commissioning
14.3

Startup Behavior

Self test
OP startup
Press the key assigned to
the icon serial Downl. or no
configuration available
Yes
No
Download
operation
Initialization
Establish connection
to PLC
Start screen
14-6
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After the power supply has been switched on, the OP performs a self
test. In the test, it checks the operability of the most important OP
components and displays the test results. The test results are then
deleted.
If a configuration is not present, the OP automatically switches to
Serial Download mode.
The OP then performs various internal initializations.
In this phase of startup, the OP attempts to establish a connection to
the PLC.
If communication is not possible (e.g. cable to the PLC has not been
connected) the OP displays a system message.
Following startup, the OP displays the configured start screen.
OP27, OP37 Equipment Manual
Release 05/99