Siemens S5-135U/155U - Manual (Page 428)

9-46
System Manual
C79000-G8576-C199-06
9.4.8 Measured-Value Representation
(rated input ranges 0 to 1 V, 0 to 10 V, 0 to 20 mA, 4 to 20 mA)
Units Rated Range Byte 0 Byte 1
0...10
V
0...1 V
mV
0... 20
mA
4...20
mA 1)
4...20
mA 2)
7
2 11
6
2 10
5
2 9
4
2 8
3
2 7
2
2 6
1
2 5
0
2 4
7
2 3
6
2 2
5
2 1
4
2 0
3
0
2
0
1
0
0
OV
2047
1536 19.99
15.00 1999
1500 39.98
30.00 35.98
28.00 31.98
24.00 0
0 1
1 1
1 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 0
0 0
0 0
0 1
1 3)
1535
1280
1025 14.99
10.01
1499
1001
29.98
20.02
27.98
20.02
23.98
20.00
16.02 0
0
0 1
1
1 0
0
0 1
1
0 1
0
0 1
0
0 1
0
0 1
0
0 1
0
0 1
0
0 1
0
0 1
0
1 0
0
0 0
0
0 0
0
0 0
0
0 4)
1024
1023
512
511
256
1
0
– 1
– 51 10.00
9.99
5.00
4.99
0.098
0
–
0.098
– 0.5
1000
999.02
500.00
499.00
0.976
0
–
0.976
–50 20.00
19.98
10.00
9.98
0.02
0
–0.02
–1
20.00
19.98
12.00
11.98
4.0156
4
3.9844
3.184
16.00
15.98
8.00
7.98
4.00
0.0156
0
–0.015
6
–0.816 0
0
0
0
0
0
0
1
1 1
0
0
0
0
0
0
1
1 0
1
1
0
0
0
0
1
1 0
1
0
1
1
0
0
1
1 0
1
0
1
0
0
0
1
1 0
1
0
1
0
0
0
1
1 0
1
0
1
0
0
0
1
0 0
1
0
1
0
0
0
1
0 0
1
0
1
0
0
0
1
1 0
1
0
1
0
0
0
1
1 0
1
0
1
0
0
0
1
0 0
1
0
1
0
1
0
1
1 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 5)
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).
Measured-Value
Representation as
Value and Sign
Shunt Resistor
Current Limiting
Load Voltage
Analog Input/Output Modules