Siemens S5-100U - Page 320

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