Measured-Value Representation - Siemens S5-155U System Manual

The 463 Analog Input Module
9.4.8
Measured-Value
Representation
Measured-value
representation as value and
sign
Units Rated Range
0...10 0...1 V 0...20
V mV mA
2047 19.99 1999 39.98
1536 15.00 1500 30.00
1535 14.99 1499 29.98
1280
1025 10.01 1001 20.02
1024 10.00 1000 20.00
1023 9.99 999.02 19.98
512 5.00 500.00 10.00
4.99 499.00 9.98
511
256 0.976
1 0.098 0 0.02
0 0 - 0
- 1 - 0.098 0.976 -0.02
- 51 - 0.5 -50 -1
Shunt resistor
Current limiting
Load voltage
9 - 48
(rated input ranges 0 to 1 V, 0 to 10 V, 0 to 20 mA, 4 to 20 mA)
Byte 0
4...20 4...20 7 6 5 4
1) 2) 11 10 9 8
mA mA 2 2 2 2
35.98 31.98 0 1 1 1
28.00 24.00 0 1 1 0
27.98 23..98 0 1 0 1
20.00 0 1 0 1
20.02 16.02 0 1 0 0
20.00 16.00 0 1 0 0
19.98 15.98 0 0 1 1
12.00 8.00 0 0 1 0
11.98 7.98 0 0 0 1
1
4.00 0 0 0
4.0156 0.0156 0 0 0 0
4 0 0 0 0 0
3.9844 -0.0156 1 1 1 1
1 1
3.184 -0.816 1 1
1)
With data format setting 0 to 1023 (switch on module)
2)
With data format setting 256 to 1279 (switch on module)
3)
Overflow
4)
Overrange
5)
Rated range
OV = Overflow bit
A 50 ohm shunt resistor is used for the 0 to 20 mA range; for 4 to
20 mA, the resistor value is 62.5 ohms.
The shunt resistors are permanently fitted to the 463 analog input
module. Broken wire detection is not possible.
For the 4 to 20 mA current measuring range, a broken wire can be
detected with currents < 3 mA.
If the positive and negative terminals of the transducer are
short-circuited when two-wire transducers are used (4 to 20 mA), the
current is limited to approximately 28 mA. Until the thermal current
limiting circuit responds (about 3 s) a short-circuit current of about
250 mA flows; this sets the overflow bit for the short-circuited
channel for this duration.
The failure of the load voltage can be detected from the result of
encoding (values < -51 units).
Byte 1
3 2 1 0 7 6 5 4
7 6 5 4 3 2 1 0
2 2 2 2 2 2 2 2
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0
0
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
1 1 0 0 1 1 0 1
C79000-B8576-C109-03
3 2 1 0
0 0 0 OV
3)
0 0 0 1
0 0 0 1
4)
0 0 0 0
0 0 0 0
0 0 0 0
5)
0 0 0 0
0 0 0
0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
System Manual