Siemens S7-300 - 2.2 Commissioning the SM 331; AI 8 x 14 Bit High Speed

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Product Information on the Manual S7-300 Module Specifications, Edition 11/2002
A5E00213444-02
2.2 Commissioning the SM 331; AI 8 14 Bit High Speed
You specify how the SM 331; AI 8 14 Bit High Speed is to work by means of
measurement range modules on the module and STEP 7.
Measuring range modules
If necessary, the measuring range modules must be replugged to change the
measuring method and the measuring range. You then have to switch the 24 V
supply off and on again at the front connector. Section 4.4 of the reference manual
provides a detailed description of how to do this.
Section 4.20.3 of the reference manual contains a table indicating the settings to
be selected for different measurement methods and ranges. The required settings
are also printed on the module.
Default settings for measuring range module
The measuring range modules are preset to “B” (voltage; " 10 V) when the
module is supplied.
To use the following preset measuring methods and measuring ranges, you only
have to change the measuring range module to the corresponding setting.
Parameter assignment in STEP 7 is not necessary.
Table 7 Defaults of the SM 331; AI 8 14 Bit High Speed via measuring range
modules
Measuring Range
Module Setting
Measuring Method Measuring Range
A Voltage " 1 V*
B Voltage " 10 V
C Current,
Four-wire transmitter
4 to 20 mA
D Current,
Two-wire transmitter
4 to 20 mA
* You must short-circuit unused channels and connect them to M
ANA
.