ETAS ES930.1 - Fig. 5-4 Active and Inactive Pulse; Fig. 5-5 Period, Starting with an Active-Inactive Edge; Fig. 5-6 Cycle, Starting with an Inactive-Active Edge and N=3

ETAS Digital Input Channels ("DI" Connection)
ES930.1 - User Guide 35
Fig. 5-4 Active and inactive Pulse
5.2.1.4 Period
A period starts with a state change or an inactive-active or an active-inactive
edge of the signal. It always consists of an active and an inactive pulse.
If the period starts with an inactive-active edge, then the period consists of the
sequence active pulse with subsequent inactive pulse. If the period starts with
an active-inactive edge, then the period consists of the sequence inactive pulse
with subsequent active pulse.
Fig. 5-5 Period, starting with an active-inactive Edge
5.2.1.5 Cycle
A cycle encompasses a repeated succession of one or several periods.
A cycle describes an integer multiple of a period:
Cycle = n * period
A cycle can start with:
• an inactive-active edge
• an active-inactive edge
Fig. 5-6 Cycle, starting with an inactive-active Edge and n=3
Inact ive
Pu l se
Time
Input
Si g n a l
Active
Inactive
Active
Pu l se
Per i o d
Ti me
Input
Si g n a l
Active
Inact ive
Cycl e
Time
Input
Si g n a l
Active
Inactive