S5-100U
The Integral Real-Time Clock
The Block Entry Sequence and a Programming Example:
The following procedure is suggested:
1.
Program FB1
- Defining system data for the integral real-time clock
2.
Program OB21
- Calling up FB1 during a change from STOP to RUN
3.
Program OB22
- Calling up FB1 when the programmable controller is switched on
4.
Generate DB75
- Storing clock data
5.
Transfer new data to the clock using the FORCE VAR programmer function (programmable
controller in the RUN mode) .
The respective programming examples are shown in Tables 12-10 to 12-14.
Table 12-10.
FB1 Program
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
STL
Meaning
Explanation
FB 1
NAME:
CLOCK
L KH
4 4 4 B
T
RS 8
L KH
0 0 4 D
T
RS 9
L KH
0 C 0 0
T
RS 10
BE
ASCII Code for the “D” character
Block number “75
D
”
Storing in system data word 8
DW0 is the start address for clock data
ASCII Code for the “M” Character
Storing in system data word 9
Flag word Number “12
D
”
ASCII Code is irrelevant
Storing in system data word 10
Clock data is
located in
DB75
beginning
with DW0
The status
word is
located in
FW12
EWA 4NEB 812 6120-02b
12-17
Summary of Contents for SIMATIC S5-100U
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Page 505: ...B Dimension Drawings EWA 4NEB 812 6120 02b ...
Page 515: ...C Active and Passive Faults in Automation Equipment EWA 4NEB 812 6120 02b ...
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Page 523: ...D Information for Ordering Accessories EWA 4NEB 812 6120 02b ...
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Page 531: ...E Reference Materials EWA 4NEB 812 6120 02b ...
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Page 535: ...F Siemens Addresses Worldwide EWA 4NEB 812 6120 02b ...
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Page 543: ...Index EWA 4NEB 812 6120 02b ...
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