Siemens Simatic M7-400 Manual de usuario Pagina 320

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Analog Modules
5-104
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
5.21.1 Commissioning the SM 431; AI 16 13 Bit
You set the mode of operation of the SM 431; AI 16 13 Bit by means of
measuring range modules on the module and in STEP 7.
Measurement Range Modules
A measuring range module of the module matches two consecutive channels to
each type of sensor. If necessary, the measuring range modules must be
replugged to change the measuring method and the measuring range. The steps
you have to perform to do this are described in detail in Section 5.4.
The corresponding table in Section 5.21.2 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.
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 5-61 Parameters of the SM 431; AI 16 13 Bit
Parameter
Value Range Default
1)
Parameter
Type
Scope
Measurement
Measuring type Disabled
U Voltage
4DMU Current (four-wire transmitter)
2DMU Current (two-wire transmitter)
U
Static Channel
Measuring
range
Refer to Section 5.21.2 for the measuring
ranges of the input channels that you can
set.
"10 V
Interference
suppression
60 Hz; 50 Hz 50 Hz
1)
Only in the CC (central controller) is it possible to start up the analog modules with the default settings.
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