LENZE EVS9325-EI EVS9325-EI EVS9325-EI EVS9325-EI EVS9325-EI EVS9325-EI

interfere with measured values, particularly for measurements within narrow
voltage ranges.
You set the line frequency with which the plant operates (400, 60, 50 or 10 Hz) using the
"Interference frequency suppression" parameter in STEP 7 (TIA Portal). The "Interference
frequency suppression" parameter can only be set module-wide (for all input channels). The
interference frequency suppression filters out the set interference frequency
(400/60/50/10 Hz) as well as multles of it. The selected interference frequency suppression
also defines the integration time. The conversion time changes depending on the set
interference frequency suppression.
For example, an interference frequency suppression of 50 Hz corresponds to an integration
time of 20 ms. The analog on-board I/O supplies one measured value to the CPU every
millisecond over a period of 20 ms. This measured value corresponds to the floating mean
value of the last 20 measurementsThe following figure shows how this works using a 400 Hz interference frequency
suppression as an example. A 400 Hz interference frequency suppression corresponds to an
integration time of 2.5 ms. The analog on-board I/O supplies a measured value to the CPU
every 1.25 milliseconds within the integration timeThe following figure shows how this works using a 60 Hz interference frequency suppression
as an example. A 60 Hz interference frequency suppression corresponds to an integration
time of 16.6 ms. The analog on-board I/O supplies a measured value to the CPU every 1.04
milliseconds within the integration time.The following figure shows how this works using a 50 Hz interference frequency suppression
as an example. A 50 Hz interference frequency suppression corresponds to an integration
time of 20 ms. The analog on-board I/O supplies a measured value to the CPU every
millisecond within the integration timeThe following figure shows how this works using a 10 Hz interference frequency suppression
as an example. A 10 Hz interference frequency suppression corresponds to an integration
time of 100 ms. The analog on-board I/O supplies a measured value to the CPU every
millisecond within the integration time.With an integration time of 2.5 ms, the measured value is changed by the following values
based on the additionally obtained basic error and noise:
• with "voltage", "current" and "resistance" by ±0.1 %
• with "Thermal resistor Pt 100 Standard" by ±0.4 K
• with "Thermal resistor Pt 100 Climatic" by ±0.3 K
• with "Thermal resistor Ni 100 Standard" by ±0.2 K
• with "Thermal resistor Ni 100 Climatic" by ±0.1 K
A detailed descrtion of the basic and operating error is available in the function manualThe individual measured values are smoothed by filtering. The smoothing can be set in 4
levels for individual channels in STEP 7 (TIA Portal).
Smoothing time = Smoothing (k) x configured integration time
The following figure shows the time it takes for the smoothed analog value to reach
approximately 100% depending on the set smoothing. This is valid for all signal changes at
the analog input.None (smoothing = 1 x integration time)
② Weak (smoothing = 4 x integration time) *
③ Medium (smoothing = 16 x integration time) *
④ Strong (smoothing = 32 x integration time) *
* The smoothing time can increase by 1 x integration time.
Figure C-5 Smoothing time depending on the set smoothing level
The following table shows the time it takes for the smoothed analog value to reach
approximately 100% depending on the set smoothing and the set interference frequency
suppression.
Table C- 2 Smoothing time depending on the set smoothing level and interference frequency suppressionThe cycle times (1 ms, 1.04 ms and 1.25 ms) result from the configured interference
frequency suppression. The cycle time is independent of the number of configured analog
channels. The values for the analog input channels are detected sequentially in each cycle.
Reference
For more information on conversion time, cycle time and conversion method, refer to thThe analog values for all measuring ranges that you can use with the analog on-board I/O
are represented in this appendix.
For cross-product information on "analog value processing", refer to the Analog value This resolution does not apply to temperature values. The digitalized temperature values are
the result of a conversion in the analog on-board I/O.The following tables list the decimal and hexadecimal values (codes) of the possible current
measuring ranges.
Table C- 8 Current measuring range ±20 mAThe following tables list the decimal and hexadecimal