Siemens S5-155U System Manual page 445

Measured-value
representation for Pt 100
resistance thermometers
Inputs Resistance Tempera-
o
in Ohms ture in C 7
4096 400.0 -
4095 399.90 -
2049 200.098 69.1
2048 200.0 66.5
2047 199.90 66.0
1024 100.00 0
1023 99.90 -0.2
1 0.098 -
0 0.0 -
System Manual
C79000-B8576-C109-03
The resolution with Pt 100 resistance thermometers is approximately
o
0.25 C.
1 ohm ≡ 10 units
Byte 0
6 5 4 3 2 1 0
11 10 9 8 7 6
S 2 2 2 2 2 2 2
0 1 1 1 1 1 1 1
0 1 1 1 1 1 1 1
0 1 0 0 0 0 0 0
0 1 0 0 0 0 0 0
0 0 1 1 1 1 1 1
0 0 1 0 0 0 0 0
0 0 0 1 1 1 1 1
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
A = Active bit
E = Error bit
OV = Overflow bit
S = Sign
When Pt 100 resistance thermometers are connected, the maximum
temperature in the rated range is 266
temperature does not exceed 850
the overrange. The resolution is then 4095 units. Unused inputs can be
utilized for voltage measurements in the 500 mV range (see front
connector assignments).
The 465 Analog Input Module
Byte 1
7 6 5 4 3 2 1
5 4 3 2 1 0
2 2 2 2 2 A E
1 1 1 1 1 0/1 0/1 1
1 1 1 1 1 0/1 0/1
0 0 0 0 1 0/1 0/1
0 0 0 0 0 0/1 0/1
1 1 1 1 1 0/1 0/1
0 0 0 0 0 0/1 0/1
1 1 1 1 1 0/1 0/1
0 0 0 0 1 0/1 0/1
0 0 0 0 0 0/1 0/1
o
C. If it can be ensured that the
o
C, the input value may extend into
0
OV
Overflow
0 Overrange
0
0
0
0 Rated range
0
0
0
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