Siemens SIMATIC S5-100U System Manual page 326

The Integral Real-Time Clock
Possible errors:
- Clock is not
available.
- Clock system data
is incorrect or not
available.
- Clock data area is
too small.
- Clock is defective.
The clock cannot
be used.
Correct the error.
*
The lower part of the flow chart has only a diagnostic function.
There is nothing you must perform.
Figure 12-8. Flowchart - Transferring a New Prompt Time
12-26
Write the settings into
the clock data area
Set transfer bit 14
in the control program
Wait about two seconds
(entering wait program
yes
Bit 14=1
no
Bit 12=1
no
Clock runs with
the new settings
for prompt time.
)
yes
Settings
incorrect
Prompt time
function is turned
off.
EWA 4NEB 812 6120-02b
S5-100U
*