Siemens SIMATIC ET 200SP Manual page 15

Parameters/address space
4.2 Explanation of parameters
Diagnostics: Changeover error
The diagnostics alarm is enabled when a changeover error occurs.
"Changeover error" diagnostics is available with the following sensor setting:
● NAMUR changeover contact
● Changeover contact, unconnected
● Changeover contact with 10 kΩ
Diagnostics: Chatter error
The diagnostics alarm is enabled when a chatter error occurs.
Chatter monitoring is a process control function for digital input signals. It detects and reports
signal changes that are unexpected in process engineering, for example when an input
signal fluctuates too often between "0" and "1". If signal characteristics like these occur, it is
a sign that the sensors are faulty or that there are instabilities from a process engineering
viewpoint.
Chatter monitoring: Monitoring window
Chatter monitoring: Setting of the monitoring window
Each input channel has a configurable monitoring window. The monitoring window is started
the first time the input signal changes. If the input signal changes within the monitoring
window more often than the configured number of signal changes, this is recognized as a
chatter error. If no chatter error is detected within the monitoring window, the window is
restarted at the next signal change.
Chatter monitoring: Number of signal changes
Chatter monitoring: Setting of the signal change
Settings for the tolerated number of signal changes during chatter monitoring within the
monitoring window.
Number of signal changes = 0 deactivates the chatter monitoring function.
Hardware interrupts
Specifies whether the rising or falling edge or both edges trigger a hardware interrupt.
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DI 8xNAMUR HF digital input module (6ES7131-6TF00-0CA0)
Manual, 02/2014, A5E03894478-01