Rockwell Automation 1771-VHSC , D17716.5.74 Very High S - Manual (Page 77)

Period/Rate and Continuous/Rate Examples E–6
Figure E.2
Operation of Outputs in Period/Rate and Continuous/Rate with Scaler = 2
50Hz at Gate/Reset
50% Duty Cycle
Scaler = 2
CHANNEL IN CONTINUOUS/RATE
ON at 20,000
OFF at 80,000
Scaler = 2
4MHz Count
= 80,000
4MHz Count
= 20,000
What the
counter sees
internally with
scaler = 2.
CHANNEL IN PERIOD/RATE
ON at 20,000
OFF at 80,000
Scaler = 2
4MHz Count = 80,000
Counter times
width of pulse
4MHz count = 80,000
Counter
Idle
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Figure E.3
Operation of Outputs in Period/Rate and Continuous/Rate with Scaler = 4
50Hz at Gate/Reset
50% Duty Cycle
Scaler = 4
CHANNEL IN CONTINUOUS/RATE
ON at 20,000
OFF at 80,000
Scaler = 4
4MHz Count
= 80,000
4MHz Count
= 20,000
What the
counter sees
internally with
scaler = 4.
CHANNEL IN PERIOD/RATE
ON at 20,000
OFF at 80,000
Scaler = 4
4MHz Count = 160,000
Counter times
width of pulse
4MHz count = 160,000
Counter
Idle
4MHz Count = 160,000
4MHz Count
= 80,000
4MHz Count
= 20,000
4MHz Count
= 20,000
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