Siemens SIMATIC S7-1200

Technical specifications
A.7 Specifications for the analog I/O
Easy Book
Manual, 03/2014, A5E02486774-AF
313
Table A- 38 Analog input representation for current (SB and SM)
System
Current measuring range
Decimal
Hexadecimal
0 mA to 20 mA
4 mA to 20 mA
32767
7FFF
23.70 mA
22.96 mA
Overflow
32512
7F00
32511
7EFF
23.52 mA
22.81 mA
Overshoot range
27649
6C01
27648
6C00
20 mA
20 mA
Nominal range
20736
5100
15 mA
16 mA
1
1
723.4 nA
4 mA + 578.7 nA
0
0
0 mA
4 mA
-1
FFFF
Undershoot range
-4864
ED00
-3.52 mA
1.185 mA
-4865
ECFF
Underflow
-32768
8000
Table A- 39 Analog input representation for voltage (CPU 1215C and CPU 1217C)
System
Voltage Measuring Range
Decimal
Hexadecimal
0 to 10 V
32767
7FFF
11.851 V
Overflow
32512
7F00
32511
7EFF
11.759 V
Overshoot range
27649
6C01
27648 6C00 10 V Rated range
20736
5100
7.5 V
34 22 12 mV
0
0
0 V
Negative values Negative values are not
supported
A.7.3
Step response for the analog inputs (AI)
The following table shows the step response times for the analog inputs (AI) of the CPU, SB
and SM.
Table A- 40 Step response (ms) for the analog inputs
Smoothing selection (sample averaging)
Integration time selection
400 Hz (2.5 ms)
60 Hz (16.6 ms)
50 Hz (20 ms)
10 Hz (100 ms)
None (1 cycle):
No averaging
CPU
N/A
63
65
130
SB
4.5
18.7
22.0
102
SM
4
18
22
100