Rockwell Automation 1756-HSC ControlLogix High Speed Counter Module - Manual (Page 34)

Rockwell Automation Publication 1756-UM007C-EN-P - November 2011
34 Frequency Modes
The inverse relationship of the increase in frequency and decrease in sampled
pulses is shown in the table.
Inverse Relationship of Frequency and Sampled Pulses
Input Frequency
at Z-Input
Scaler Value No. of 4 MHz Pulses
in Present Value Tag
2 Hz
1 1,000,000
2 2,000,000
4 4,000,000
5 Hz
1 400,000
2 800,000
4 1,600,000
10 Hz
1 200,000
2 400,000
4 800,000
20 Hz
1 100,000
2 200,000
4 400,000
50 Hz
1 40,000
2 80,000
4 160,000
100 Hz
1 20,000
2 40,000
4 80,000
200 Hz
1 10,000
2 20,000
4 40,000
500 Hz
1 4,000
2 8,000
4 16,000