Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Manuel d'utilisateur télécharger pdf (Page 35)

Publication 1794-6.5.11 - September 2011

Install Your FLEX I/O Frequency Input Module 25

Resolution % is defined as:

Accuracy % is defined as:

% Resolution =

100

Count frequency x minimum frequency sample time

% Accuracy =

100

1 -

Minimum frequency sample time

Minimum

frequency sample

time

count frequency

Resolution and Accuracy

Accuracy

Minimum

Frequency

Sample

Time (ms)

Sampling

Accuracy

Time

Base

Accuracy

Worst

Case

Total

Accuracy

Deviation in Hz Due to

Total Accuracy

Resolution

1.0…3276.7

Frequency

Range

(in Hz)

1…32767

Frequency

Range

(in Hz)

2 0.02% 0.0225% 0.0425 0.1…1.4 1…14 0.01%

4 0.01% 0.0225% 0.0325 0.1…1.1 1…11 0.005%

5 0.008% 0.0225% 0.0305 0.1…1.0 1…10 0.004%

10 0.004% 0.0225% 0.0265 0.1…0.9 1…9 0.002%

20 0.002% 0.0225% 0.0245 0.1…0.8 1…8 0.001%

50 0.0008% 0.0225% 0.0233 0.1…0.8 1…8 0.0004%

100 0.0004% 0.0225% 0.0229 0.1…0.8 1…8 0.0002%

200 0.0002% 0.0225% 0.0227 0.1…0.7 1…7 0.0001%

500 0.00008% 0.0225% 0.02258 0.1…0.7 1…7 0.00004%

1000 0.00004% 0.0225% 0.02254 0.1…0.7 1…7 0.00002%

Input Map

Bit 15141312111009080706050403020100

Word Read

0 Frequency 0…32,767 or 0.0…3,276.7 Channel 0

1 % Full Scale 0.0…3,276.7% Channel 0 or Acceleration -32,768…32,767 Channel 0

2 Frequency 0…32,767 or 0.0…3,276.7 Channel 1

3 % Full Scale 0.0…3,276.7% Channel 1 or Acceleration -32,768…32,767 Channel 1

4 R R Direction

Ch 0

F/A

Ch 0

MPA

Ch 0

R R Direction

Ch 1

F/A

Ch 1

MPA

Ch 1

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 86 87

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Rockwell-automation 1794-IJ2XT FLEX I/O Frequency Input Modules User M Manuel d'utilisateur Page 35

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