Siemens Simatic S7-400 - Manual (Page 342)

Analog Modules
5-126
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
5.23.1 Commissioning the SM 431; AI 8 RTD 16 Bit
You set the mode of operation of the SM 431; AI 8 RTD 16 Bit in STEP 7.
Parameters
You will find a description of the general procedure for assigning parameters to
analog modules in Section 5.7.
An overview of the parameters that you can set and their default settings are
shown in the table below.
Table 5-71 Parameters of the SM 431; AI 8 RTD 16 Bit
Parameter Value Range Default 2) Parameter
Type
Scope
Enable
•
Diagnostic interrupt 1)
•
Hardware interrupt 1)
Yes/no
Yes/no No
No Dynamic Module
•
Destination CPU for
interrupt 1 to 4 –
Static Module
Trigger for hardware
interrupt
3)
Dynamic Channel
•
High limit
•
Low limit
32767 to – 32768
– 32768 to 32767
– Dynamic Channel
Diagnostics
•
Wire break
•
Underflow
•
Overflow
Yes/no
Yes/no
Yes/no No
No
No
Measurement
•
Measuring type Disabled
RTD-4L Thermal resistor
(linear, four-conductor
terminal)
RTD-3L Thermal resistor
(linear, three-conductor
terminal)
RTD-3L
Static Channel
•
Measuring range Refer to Section 5.23.2 for the
measuring ranges of the input
channels that you can set. Pt 100
standard
•
Temperature unit Degrees Celsius; degrees
Fahrenheit Degrees
Celsius
Static Module
•
Temperature
coefficient for
temperature
measurement with
thermal resistor (RTD) For platinium (Pt)
0.00385
W/W / ° C
0.003916
W/W
/ ° C
0.003902 W/W / ° C
0.003920 W/W / ° C
For nickel (Ni)
0.00618
W/W / ° C
0.00672
W/W
/ ° C
0.00385
Static Channel