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Programming example for "read system time"
FB 14 is programmed for the "read system time" function. The current values
should be stored in data block DB 11 (data word DW 0 to DW 3).
STEP 5 program:
FB14
NAME
:CLKRD
:MBR EEC00
:
:LRW +11
:
:L
KB
:!=F
:JC
=NIVO
:
:TAK
:SLD 4
:MAB
:L
KB 2
:JU
OB 121
:BEU
:
NIVO
:
:
:BE
Data block DB 11 contains the following information after OB 121 is called
(example):
0: KH = 2994;
1: KH = 9555;
2: KH = 1010;
3: KH = 9308;
4:
It is Tuesday the 10th of August 1993, 15 hours, 57 minutes, 29 seconds and
940 milliseconds (9 tenths and 4 hundredths of a second).
CPU 948 Programming Guide
C79000-G8576-C848-04
Load start address of the DB list
in BR
Load start address of DB 11 in memory
(paragraph address) in ACCU 1
0
Check that OB 11 is loaded
Jump to error handling
if DB start address = 0
Absolute address of DB 11 (DW 0)
Load contents of ACCU 1 into BR register
Load function no. '2' in ACCU-1-L
Read system time
Error handling
29 sec., 940 millisec.
24 hour format, 15 hours, 55 minutes
10 days, weekday '1'(Tuesday), 0
93 years, 8 months
OB 121: Set/Read System Time
6 - 11
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