The RTU has two ways to detect digital signals onto the 8 digital inputs (DI's):
•
Standard detection of digital signals
When this option is selected the positive and negative slopes of the digital input will be
detected with a predefined debounce time (x * 25ms) to exclude spikes. Each slope will
be transmitted as an event via an ASDU TI30 to the IEC60870-5-104 master.
•
Combined detection of digital signals
This option can be enabled/disabled. This feature is specially implemented for short
circuit detectors. With this option enabled short pulses within pulses will be combined:
This detection is polarity dependent!
A positive slope will be detected as a valid event when the puls is > 3 ms.
After a positive slope, a falling slope detection will be started, this falling slope is
not valid when the duration time < 10 ms,
valid, event will be transmitted, when the duration is > 10 ms.
