Module
Parameter assignment
Measured values
Explanation
decimal
hexadecimal
4 AI RTD
4 AI TC
● "Wire break" diagnostics
enabled
32767
7FFF
H
● "Wire break" diagnostic message
● "Wire break" diagnostics
disabled
-
-
● Open input: Undefined measured
value
1
Measuring range limits for wire break detection in measuring range 4 to 20 mA: At 3.6 mA
13.8.2
Analog value representation for measuring ranges with SIMATIC S7
Representation of analog values
The digitized analog value for input and output values is the same in the same rated range.
Analog values are represented in twos complement.
The following table shows the analog value representation of the analog electronic modules.
Table 13-9
Analog value representation (SIMATIC S7 format)
Resolution
Analog value
Bit number
15 14
13
12
11
10 9
8
7
6
5
4
3
2
1
0
Significance of the bits S
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Sign
The sign (S) of the analog value is always in bit number 15:
● "0" → +
● "1" → -
Example
Table 13-10 Example
Analog value
decimal
binary
hexadecimal
-1
1111 1111 1111 1111
FFFF
H
-32768
1000 0000 0000 0000
8000
H
Measured-value resolution
The following table shows the representation of the binary analog values and the
corresponding decimal and hexadecimal representation of the units of the analog values.
Analog electronic modules
13.8 Representation of analog values
ET 200iSP
292
Operating Instructions, 11/2017, A5E00247483-07
Содержание SIMATIC ET 200iSP
Страница 82: ...Configuration options 3 18 Redundancy with IM 152 ET 200iSP 82 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 184: ...Commissioning and Diagnostics 6 8 Diagnostics with STEP 7 ET 200iSP 184 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 194: ...Maintenance 7 7 Reading service data ET 200iSP 194 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 220: ...Terminal modules 9 6 Terminal module TM RM RM ET 200iSP 220 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 372: ...Glossary ET 200iSP 372 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 384: ...Index ET 200iSP 384 Operating Instructions 11 2017 A5E00247483 07 ...