Commissioning The Sm 331; Ai 8 X 14 Bits High Speed - Siemens SIMATIC S7-300 Reference Manual

Commissioning the SM 331; AI 8 x 14 bits High Speed

4.20.2
You set the mode of operation of the SM 331; AI 8 x 14 bits High Speed by means
of measuring range modules on the module and in STEP 7.
Meas. range module
If necessary, the measuring range modules must be replugged to change the
measuring method and the measuring range. You must then switch the 24 V
supply off and on at the front connector. The steps you have to perform to do this
are described in detail in the reference manual, Section 4.4.
The corresponding table in the reference manual, Section 4.20.3, tells you which
assignment you have to select for which measuring method and measuring range.
In addition, the necessary settings are embossed 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 4-59 Default Settings of the SM 331; AI 8 x 14 bits High Speed using Measuring
Measuring Range
Module Setting
*
You must short-circuit unused channels and connect them to M
Parameter
You will find a description of the general procedure for assigning parameters to
analog modules in the reference manual, section 4.7.
An overview of the parameters that you can set and their default settings are
shown in the table below.
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Range Modules
A
B
C
Four-wire transmitter
D
Measuring Method
Voltage
Voltage
Current,
Current,
Two-wire transmitter
Analog Modules
Measuring Range
" 1 V*
" 10 V
4 to 20 mA
4 to 20 mA
.
ANA
4-103