Siemens SIMATIC 505 User Manual
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.
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
Turns on when there is current flow through the B input.
Y1
Turns on when Output 1 is on.
Y2
Turns on when Output 2 is on.
NOTE:ăIf Reset or Inhibit is turned on, the HSC does not count, and the A
and B LEDs are frozen.
and B LEDs are frozen.