Siemens High Speed Counter and Encoder Module SIMATIC 505 Manuel d'utilisateur Page 12

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1-6
Series
505 High Speed Counter
and Encoder Module User
s Manual
1.4 LED Indicators
Each
channel contains four LED indicators which provide a visual
indication of the channel’
s status as shown in Figure 1-3.
Figure 1-3
High
Speed Counter LEDs
A Turns
on when there is current flow through the A input.
B T
urns on when there is current flow through the B input.
Y1 T
urns on when Output 1 is on.
Y2 T
urns on when Output 2 is on.
NOTE:ă
If Reset or Inhibit is turned on, the HSC does not count, and the A
and B LEDs are frozen.
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