PSS SB DI8O8
6 Operating Manual
Signal change behaviour
If a signal change occurs at an input, the module will send an Event
Telegram. The module must then wait for the acknowledgement telegram
(ACK) from the Master-LD before it can send a new Event Telegram.
If another signal change occurs while the module is waiting for the
acknowledgement telegram, the module's response will depend on the
configured signal change behaviour.
Two behaviour modes may be defined:
• “Default”:
The signal change is not registered
• “Fast”:
Each signal change is stored in a FIFO telegram buffer. If the
acknowledgement telegram arrives, the module will send an Event
Telegram from the FIFO telegram buffer for each signal change
detected.
"1"-Signal
"0"-Signal
t
1
t
1
t
t
2
U
t
1
: Pulse length for guaranteed signal detection for “1” or “0” signals
(> Event Timeout)
t
2
: Max. pulse length for pulse suppression on “1” or “0” signals
(500 µs)
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