Rockwell Automation Publication 2080-UM004C-EN-E - March 2015
35
High Speed Counter – 2080-MOT-HSC
Appendix
4
User Defined Function
Blocks
RA_HSCPlugIn
The purpose of this UDFB is to get high speed counter accumulator value and
current pulse frequency.
1001
1000
999 Hz
1000 Hz
0.10%
9,999
10,000
100.01 Hz
100.00 Hz
0.010%
99,999
100,000
10.00010 Hz
10.00000 Hz
0.001%
(1) This table does not represent accuracy per pulse but repeatability. This repeatability can be applied in No
Filter setting.
Maximum Cyclic Rate Errors
Update Time
Value Scalar
Frequency
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
1
NA
NA
20.02%
20.02%
0.210%
10
NA
20.11%
2.020%
0.210%
0.030%
100
20.01%
2.110%
0.220%
0.031%
0.012%
1000
3.010%
0.310%
0.040%
0.013%
0.010%
10,000
1.210%
0.130%
0.022%
0.011%
0.010%
IMPORTANT
For low frequency pulses, filter times should be set appropriately to
avoid extra pulses from a noisy environment. For high frequency pulses,
shielded cable must always be used.
Per Pulse Errors
(1)
Real pulses
(note 1.9999 can
be rounded to 2)
Pulses
reported by
module
Real
Frequency
Reported
Frequency
% Error
RA_H
S
CPlugIn
FBEN
S
lotID
NoiseFilter
Mode
FBENO
IDCheck
S
tart
S
top
Initialized
Accumulator
Rate
