II - DCE FEL ČVUT v Praze

Temperature range
type L
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
Table 3-14 shows the representation of the digitized measured value for the
temperature range, sensor type L.
Table 3-14 Representation of the digitized measured value of an analog input
module (temperature range, type L)
Temperature
range in C
SIMATIC S7 Ex Analog Modules
Decimal Hexadecimal Range
> 1150.0 32767 7FFFH Overflow
1150.0
13500 2CECH
:
:
:
Overrange
900.1
9001 2329H
1)
900.0
9000 2328H
:
:
:
:
:
:
Rated range
-200.0
-2000 F830H
-200.1 -2001 F82FH Underrange 1)
In the case of incorrect wiring (e.g. polarity reversal, open inputs) or a sensor fault in
the negative range (e.g. incorrect type of thermocouple), on dropping below F380H the
analog input module signals underflow and outputs 8000H .
1) The characteristic of the thermocouple is not defined in the overrange and
underrange. The rise of the characteristic curve is retained on leaving the linearized
rated range. It is not possible to specify the accuracy of these ranges.
3-15