Siemens NAN 67 Series Manual de servicio descargar pdf (Pagina 291)

C-9

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

When you enter time duration using the S5TIME data type, your entries are

stored in binary coded decimal format (BCD, see Figure C-7 and Table C-8).

When working with S5TIME, you enter a time value in the range of 0 to 999

and you indicate a time base (see Table C-8). The time base indicates the

interval at which a timer decrements the time value by one unit until it

reaches 0.

Time base

1 second

Irrelevant: These bits are ignored when the timer is started.

Time value in BCD (0 to 999)

15... ...8 7... ...0

127

x x10000100100111

Figure C-7 Contents of Timer Address: Timer Value 127, Time Base 1 Second

Table C-8 Time Base for S5TIME

Time Base

Binary Code for the Time Base

10 ms 00

100 ms 01

1 s 10

10 s 11

You can pre-load a time value using either of the following syntax formats:

S W#16#wxyz

– Where w = the time base (that is, the time interval or resolution)

– Where xyz = the time value in binary coded decimal format

S S5T# aH_bbM_ccS_ddMS

– Where a = hours, bb = minutes, cc = seconds, and dd = milliseconds

– The time base is selected automatically and the value is rounded to the

next lower number with that time base.

The maximum time value that you can enter is 9,990 seconds, or

2H_46M_30S.

When you enter date and time using the DATE_AND_TIME data type, your

entries are stored in binary coded decimal format (see Table C-9). The

DATE_AND_TIME data type has the following range:

DT#1990-1-1-0:0:0.0 to DT#2089-12-31-23:59:59.999

Entering Duration

of Time

Entering Date and

Time

Number Notation

1 2 ... 286 287 288 289 290 291 292 293 294 295 296 ... 317 318

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