Startup And Setting The Td 390 - Siemens SIMATIC S5 TD 390 Manual Del Usuario

4.2

Startup and Setting the TD 390

Startup After connecting the TD 390 to the PLC, the unit performs a self–test.
After this, the TD attempts to set up a connection to the PLC. If no
connection is set up within about 20 seconds, you must check the cause
(defective cable, connector not plugged in, etc.). If connection setup is
successful, the parameters required by the TD 390 are read (see Section
8.4) and, if the flag bits are set, messages are displayed.
The diagram below shows the various options for startup.
Parameters from DB
are used in PLC
Assigning
If a valid parametric DB exists, messages (if the flag bits are set) are
parameters
immediately displayed in the display.
from the PLC
TD 390
C79000–K8576–C292–01
Self–test
TD 390 sets up
connection to PLC
Parametric
Yes
No
DB
in PLC
Parameters preset
in TD are used
Messages are
displayed
Operating the TD 390
Modify parameters
set in TD
(if necessary)
4-3