Parameters/address space
4.3 Explanation of the parameters
Analog Input Module AI 4xI 2-/4-wire ST (6ES7134-6GD01-0BA1)
Equipment Manual, 06/2020, A5E03551866-AF
20
Smoothing
The individual measured values are smoothed by filtering. The smoothing can be set in
4 levels.
Smoothing time = number of module cycles (k) x cycle time of the module.
The following figure shows how many module cycles it takes for the smoothed analog value
to approach 100%, depending on the configured smoothing. This applies to every signal
change at the analog input.
①
No smoothing (k = 1)
②
Weak (k = 4)
③
Medium (k = 8)
④
Strong (k = 16)
Figure 4-1
Smoothing with AI 4xI 2-/4-wire ST
Interference frequency suppression
Suppresses the interference affecting analog input modules that is caused by the frequency
of the AC voltage network used.
The frequency of the AC voltage network can negatively affect the measured value, in
particular when measuring in the low voltage range and with thermocouples. With this
parameter, the user specifies the supply frequency that is predominant in the plant.
Potential group
A potential group consists of a group of directly adjacent I/O modules within an ET 200SP
station, which are supplied via a common supply voltage.
A potential group begins with a light-colored BaseUnit through which the required voltage is
supplied for all modules of the potential group. The light-colored BaseUnit interrupts the
three self-assembling voltage buses P1, P2 and AUX to the left neighbor.
All additional I/O modules of this potential group are plugged into dark-colored BaseUnits.
You take the potential of the self-assembling voltage buses P1, P2 and AUX from the left
neighbor.
A potential group ends with the dark-colored BaseUnit, which follows a light-colored
BaseUnit or server module in the station configuration.