Siemens SIMATIC S5-90U System Manual page 437

S5-90U/S5-95U
Analog Value Representation
Table 15-22. Analog Input Module 464-8MD11 (Bipolar Fixed-Point Number)
Units Meas. Val.
in mA
>4095 40.0
4095 39.9902
2049 20.0098
2048 20.0
1024 10.0
1 0.0098
0 0.0
- 1 - 0.0098
- 1024 - 10.0
- 2048 - 20.0
- 2049 - 20.0098
- 4095 - 39.9902
<- 4095 - 40.0
Standard function block FB 250 (read in analog value) can be used to normalize the analog value.
Set type fo channel Y = 6 "bipolar fixed-point number" in function block FB 250.
EWA 4NEB 812 6115-02b
High Byte
0 1 1 1 1 1 1
0 1 1 1 1 1 1
0 1 0 0 0 0 0
0 1 0 0 0 0 0
0 0 1 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
1 1 1 1 1 1 1
1 1 1 0 0 0 0
1 1 0 0 0 0 0
1 0 1 1 1 1 1
1 0 0 0 0 0 0
1 0 0 0 0 0 0
Low Byte
1 1 1 1 1 1 0 0
1 1 1 1 1 1 0 0
0 0 0 0 0 1 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 0
0 0 0 0 0 0 0 0
1 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
1 1 1 1 1 1 0 0
0 0 0 0 0 1 0 0
0 0 0 0 0 1 0 0
Module Spectrum
Range
1 Overflow
0 Overrange
0
0
0
0
0 Nominal range
0
0
0
0 Overrange
0
1 Overflow
15-71