Siemens Simatic S7-300, Инструкция по установке и эксплуатации

Страница: 182 / 356

Analog modules
9.2 SM 336; AI 6 x 13 Bit
Fail-safe signal modules
182
Installation and Operating Manual, 01/2010, A5E00085586-10
9.2 SM 336; AI 6 x 13 Bit
9.2.1 Analog value representation
Measured value ranges
Table 9- 1 Measured value ranges of SM 336; AI 6 x 13Bit
Measuring range Unit Range
0 mA to 20
mA
4 mA to 20
mA
0 V to 10 V as
percentage
of the
nominal
range
Decimal Hexade
cimal
Standard
mode
Safety mode Standard
mode
Mode of
operation
> 23.515 mA > 22.814 mA > 11.7593 V > 117,589 32767 7FFF
H
* Overflow
23.515 mA
.
.
20.007 mA
22.814 mA
.
.
20.007 mA
11.7589 V
.
.
> 10.0004 V
117,589
.
.
100,004
32511
.
.
27649
7EFF
H
.
.
6C01
H
Overrange
20 mA
.
.
2.89 μA
0 mA
20 mA
.
.
4 mA +
2.315 μA
4.00 mA
10 V
.
.
1.45 V
0 V
100
.
.
0,014
0
27648
.
.
4
0
6C00
H
.
.
4
H
0
H
Nominal range
-0.0007 mA
.
.
-3.518 mA
3.9995 mA
.
.
1.185512 mA
-0.36 mV
.
.
-1.759 V
-0,0036
.
.
-17,593
-1
.
.
-4864
FFFF
H
.
.
ED00
H
Underrange
< -3.518 mA < 1.185 mA
(see below)
< -1.759 V < -17,593 -32768 8000
H
* Underflow
* In
S7 F/FH Systems
a fail-safe value is output for this value in the safety program when overflow or
underflow is detected.
In
S7 Distributed Safety
, the fail-safe value 0 is provided in the PII for the safety program in place of
7FFF
H
(for overflow) and 8000
H
(for underflow).
Units in decimal/hexadecimal format can only assume values of a multiple of four.