Principle Of Operation; Configuring Frequency Meters - Siemens SIMATIC ET 200iSP Operating Instructions Manual

Configurations (principle)
4.18 Metering frequencies
4.18.2

Principle of operation

Frequency measurement
The signal frequencies are determined from the input signals of channel 0 or 1 of the electronic
module. To calculate the frequency, the signals are measured within a parameterizable
measuring window.
The frequency is represented as a 16-bit value in fixed point format and transferred to the PII.
The frequency meters calculate the frequency according to the following formula:
Exceeding the input frequency
If the input frequency exceeds 5 kHz, then 7FFF
frequency above approx. 8 kHz, correct actual values can no longer be output.
4.18.3

Configuring frequency meters

Procedure in HW Config
Use the mouse to drag the configuration "2 Trace/ 6 DI NAMUR" from the hardware catalog to the
configuration table or set the configuration with the parameters.
Configuration "2 Trace/ 6 DI NAMUR"
Assignment of the digital inputs at the electronic module 8 DI NAMUR
You can find more information on the pin assignment in the technical specifications of the
electronic module 8 DI NAMUR.
Table 4-15
Digital input
Channel 0
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
98
Assignment of digital inputs for "2 Trace/ 6 DI NAMUR"
Terminal
1, 2
5, 6
9, 10
13, 14
3, 4
7, 8
11, 12
15, 16
is reported as the actual value. At an input
H
Assignment
Frequency meter 1
Frequency meter 2
Digital input 2
Digital input 3
Digital input 4
Digital input 5
Digital input 6
Digital input 7
Operating Instructions, 11/2022, A5E00247483-AK
ET 200iSP