Redundancy With Im 152; Introduction - Siemens SIMATIC ET 200iSP Operating Instructions Manual

Parameters
Only those parameters that are relevant for the frequency meters are explained below. These
are part of the parameters of electronic module 8 DI NAMUR.
Table 3-14
Parameters
Sensor type frequency
inputs
Measuring window
(GATE)
3.18

Redundancy with IM 152

3.18.1

Introduction

Properties
You can operate the ET 200iSP in redundant mode on S7-DP masters (for example, S7-400H)
Power Supply of the ET 200iSP
To ensure consistently high availability during redundant operation with 2 IM 152 interface
modules, it is also recommended that you configure the ET 200iSP with a redundant power
supply PS.
See also
Redundancy of the Power Supply (Page 60)
ET 200iSP
Operating Instructions, 11/2017, A5E00247483-07
Parameters for the frequency meters
Setting
● Channel disabled
● NAMUR sensor
● Single contact, no load
resistance
● 50 ms
● 200 ms
● 1 s
Configuration options
3.18 Redundancy with IM 152
Description
Select the sensor for the relevant frequency
meter for channel 0 or 1.
Select the required measuring window for
channel 0 or 1.
To achieve the highest possible accuracy
when metering frequencies, remember the
following rules:
● High frequencies (> 4 kHz): Set a low
measuring window (50 ms)
● Variable/medium frequencies: set
medium measuring window (200 ms)
● Low frequencies (< 1 kHz): Set a high
measuring window (1 s)
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