The Integral Real-Time Clock S5-95F
10.5 Programming the Integral Real-Time Clock in the Control Program
In the following sections, we use examples to describe how you can set and evaluate the integral
real-time clock via the control program.
Convention:
In the following examples, we assume that the parameter set for the clock has already been stored
in DB1; the clock data area occupies data words DW 0 through DW 21 in DB200, and the status
word occupies data word DW 22.
10.5.1 Reading and Setting the Clock
Example: Setting the Clock Time and Date
Transfer of the settings for the time and date is triggered by input I 0.0. The settings are available in
flag bytes FY121 to 127; they have been received, for example, by the SINEC L1 master. Values
that you do not want to change must be preset with FF
H
.
Input 1.0 defines the clock mode (0 = 24-hour mode, 1 = 12-hour mode). Input 1.1 is the AM/PM
bit for the 12-hour mode.
The clock data area is in DB200, beginning with DW0; the status word is DW 22.
OB1 STL Explanation
: ================================
: SETTING THE TIME AND DATE
:A I 0.0 ================================
:AN F 0.0 FIRST TRANSFER TIME AND DATE VALUES
:S F 20.0 TO FY121 to FY127.
:A I 0.0 CLOCK SETTING TRIGGERED BY
:= F 0.0 SETTING OF F 20.0
: (IS RESET IN FB 10)
:JU FB 10
NAME :SET CLOCK
WDAY : FB 121 WEEKDAY
DAY : FB 122 DAY
MON : FB 123 MONTH
YEAR : FB 124 YEAR
HOUR : FB 125 HOUR
AMPM : I 1.1 AMPM BIT (ONLY RELEVANT IN 12-HOUR MODE)
MIN : FY 126 MINUTES
SEC : FY 127 SECONDS
EER : F 12.1 ERROR BIT
MODE : I 1.0 CLOCK MODE
:BE
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10-10
EWA 4NEB 812 6210-02
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