Integral Real-Time Clock
S5-90U/S5-95U
13.6
Programming the Integral Real-Time Clock in the User Program
The programming of the clock in the user program should be performed only by users with extensive
knowledge of the system. For all other users, use of DB1 is recommended (see Sections 13.5 and
13.6). The following section provides you with information on how to access the clock through the
user program.
13.6.1 Reading and Setting the Clock
Example:
Program for setting the time and date
Transfer of the settings for the time and date is triggered by input I 32.0. Before you set input I 32.0
(see OB1), you must transfer these settings to flag bytes FY120 to FY127. Values that you do not
want to change must be preset with ”FF
H
”. You can define the clock mode with input I 33.0 (1 =
12-hour mode). Input I 32.1 is the AM/PM bit that you use for setting the 12-hour mode.
The clock data area is located in DB2 beginning with DW0, and the status word is FW10.
OB1 STL
Explanation
: ================================
: SETTING THE TIME AND DATE
: ================================
: FIRST TRANSFER TIME AND DATE VALUES
: INTO FB120 TO FB127.
:U E 32.0 CLOCK SETTING TRIGGERED
:S M 20.0 BY SETTING F 20.0 (RESET IN FB10)
:
:SPA FB 10
NAME :UHR-STEL
WDAY : MB 121 WEEKDAY
DAY : MB 122 DAY
MON : MB 123 MONTH
YEAR : MB 124 YEAR
HOUR : MB 125 HOUR
AMPM : E 32.1 AMPM-BIT (ONLY IMPORTANT IN 12-HOUR MODE)
MIN : MB 126 MINUTES
SEC : MB 127 SECONDS
ERR : M 12.1 ERROR BIT
MODE : E 33.0 12 HOUR-MODE: I 33.0 = 1
:BE
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EWA 4NEB 812 6115-02b
Содержание SIMATIC S5-90U
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