Rockwell Automation 1797-IJ2 FLEX Ex Frequency Input Module - Manual (Page 13)

FLEX Ex Frequency Input Module 13
Publication 1797-5.9 - June 2010
Resolution and Accuracy
Input Map
Accuracy
Minimum
Frequency
Sampling
Time in ms
Sampling
Accuracy Time Base
Accuracy
Worst Case
Accuracy
Deviation in Hz Due to
Total Accuracy
Resolution
(%) 1.0…3276.7
Freq. Range
(Hz)
1…32767
Freq.
Range (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 … 10 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 … 0.7Hz +1 … 7 0.00002%
Bit  15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
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 GS
Ch
0 F/A
Ch 0 WO
Ch 0 MPA
Ch 0 R R Direction
Ch 1 GS
Ch
1 F/A
Ch
1 WO
Ch
1 MP
A
Ch 1
5 Reserved Diagnostic Status
Channel 0 Reserved Diagnostic Status
Channel 1
6 Reserved
Where: GS = Gate state
F/A = Frequency/Accel alarm
WO = Wire-off alarm
MPA = Missing pulse alarm
R = Reserved