Siemens S7-400 Benutzerhandbuch

5-136

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Table 5-74 Parameters of the SM 431; AI 8 

 

 16 Bit, continued

•

Smoothing

None
Low
Average
High

None

•

Reference junction 
(reference to the cold
junction)

None
Internal
Reference temperature value dynamic

Internal

Static

Module

If you use the module in ER-1/ER-2, you must set this parameter to “No” because the interrupt lines are
not available in ER-1/ER-2.

Only in the CC (central controller) is it possible to start up the analog modules with the default settings.

The limit values must be within the temperature range of the connected sensor.

Valid for the format of the output temperature and the dynamic reference temperature

You fill find information that is generally applicable to the smoothing of analog
values in Section 5.6.

The cycle time of the module is a constant in the  SM 431; AI 8 

 

 16 Bit that is not

dependent on the number of channels that are enabled. It therefore has no effect
on the step response, which is defined by the parameter assignment of
interference frequency suppression and smoothing.

Table 5-75 How Response Times Depend on the Parameterized Interference Frequency Suppression

and Smoothing of the SM 431; AI 8 

 

 16 Bit 

10

100

200

1600

3200

50

20

40

320

640

60

16.7

33.3

267

533

400

10

20

160

320

The following figures illustrate the contents of Table 5-75. They show the response
time required for a step response before the smoothed analog value is almost
applied to 100%. The figures apply to every change of signal at an analog input.