Filter selection, Scalar selection – Rockwell Automation 1734-VHSC24 Point I/O Very High Speed Counter Module User Manual
Page 17
POINT I/O 5V DC and 24V DC Very High Speed Counter Module 17
Publication 1734-IN003F-EN-E - January 2014
The module uses several words to communicate real-time input and output data as well as
non-real-time module information (for example, description, and revision) and
Filter Selection
07
06
05
04
03
02
01
00
0
0
ZF
BF
AF
FS
0
0
0
0
No filter
0
0
0
1
50 kHz (10
μs + 0 μs/-1.6 μs)
0
0
1
0
5 kHz (100
μs + 0 μs/-13.2 μs)
0
1
0
0
500 Hz (1.0 ms + 0 ms/-125
μs)
1
0
0
0
50 Hz (10 ms + 0 ms/-1.25 ms)
0
A input not filtered
1
A input filtered
0
B input not filtered
1
B input filtered
0
Z input not filtered
1
Z input filtered
Assumes a 50% duty cycle signal.
Scalar Selection
07
06
05
04
03
02
01
00
Scalar
(1)
0
0
0
0
0
0
0
1
Z – F
min
= 0.149 Hz
0
0
0
0
0
0
1
0
Z/2 – F
min
= 0.298 Hz
0
0
0
0
0
1
0
0
Z/4 – F
min
= 0.596 Hz
0
0
0
0
1
0
0
0
Z/8 – F
min
= 1.192 Hz
0
0
0
1
0
0
0
0
Z/16 – F
min
= 2.384 Hz
0
0
1
0
0
0
0
0
Z/32 – F
min
= 4.768 Hz
0
1
0
0
0
0
0
0
Z/64 – F
min
= 9.537 Hz
1
0
0
0
0
0
0
0
Z/128 – F
min
= 19.073 Hz
1
B input filtered
0
Z input not filtered
1
Z input filtered
(1)
Where F
min
indicates the frequency at which the zero frequency detect is asserted due to counter overflow.