Time/date

Does anyone know what kind of sfc I will use to see the time and date of the cpu.
I want to see the time and date on a TP 177A. Then I will use the time of day in my program. Does anyone know how to do this
CPU type is S7314c-2dp
With best regard and hope of a good answer //Mike

Hello fagerstaplc;

SFCs for the real-time Clock of a Siemens S7-300/400 PLC:




SFC1 READ_CLK Read System Clock






Daniel Chartier

I'm not quite sure whether you want to set the time in the CPU to the same time as the TP or whether you want to display the CPU time on the TP.

In the latter case, if you don't need ms accuracy, an easier way is to read the current time in the local TEMP OB1_DATE_AND_TIME in OB1 and then save it Byte for Byte in a series of Marker Bytes or in a DB for access by other parts of the program and for display on the TP.

Contrary to popular belief, this is not the time at which OB1 ran for the first time, but is updated every cycle.

S7 System time

Hi

Look in the picture I have attached.
Here is how I read the system time in S7-300.

No picture will attach, so I paste it in as text.

CALL SFC 1
RET_VAL:=#Temp_int
CDT :=#tid
L LB 4
BTI
T DB1.DBW 38 YEAR
L LB 5
BTI
T DB1.DBW 40 MONTH
L LB 6
BTI
T DB1.DBW 42 DAY
L LB 7
BTI
T DB1.DBW 44 HOUR
L LB 8
BTI
T DB1.DBW 46 MINUTE
L LB 9
BTI
T DB1.DBW 48 SECOND
L LB 10
BTI
T DB1.DBW 50 MSECOND_H
L LB 11
BTI
T DB1.DBW 52 MSECOND_L

Thx alot I will test this in the afternoon