Siemens SIMATIC S5-100U System Manual page 175

S5-100U
Example: KT 40.2 corresponds to 40 x 1 s.
Tolerance:
The time tolerance is equivalent to the time base.
Examples
Possible
settings for
the time
40 s
Note
Always use the smallest time base possible.
Loading a Time as an Input, Output, Flag, or Data Word
Load Statement:
The time 638 s is stored in data word DW2 in BCD code.
Bits 14 and 15 are insignificant for the time value.
15
1 0
Time base
Key for Time Base:
Base 0 0
Factor 0.01 s
You can also use the control program to write to data word DW2.
Example: Store the value 270 x 100 ms in data word DW2 of data block DB3.
C DB 3
L KT 270.1
T DW2
EWA 4NEB 812 6120-02b
Operand
KT 400.1 400 x 0.1 s
KT 40.2 40
KT 4.3 4
L DW 2
11
0 1 1 0 0 0
Three-digit time value
(in BCD code)
0 1 1 0 1 1
0.1 s 1 s 10 s
Time Interval
- 0.1 s 39.9 s to 40 s
x 1 s - 1 s 39 s to 40 s
x 10 s - 10 s 30 s to 40 s
0
1 1 1 0 0 0
STEP 5 Operations
Bit
DW2
8-17