Allen-Bradley Rockwell Automation 842E-MIP Series, Руководство пользователя

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Rockwell Automation Publication 842E-UM001B-EN-P—April 2015 15
EtherNet/IP overview Chapter 3
Denominator Test
Numerator Denominator
Measuring
Range (CMR)
Bi-Directional
Rollover Test
Pass/Fail
One Rev
Distance Check
Test
One Rev Distance
Accuracy (counts) NOTES
1 0 262,144 Pass Pass n/a
Message Instruction Errors – this is expected
operation
1 2 262,144 Pass Pass Pass
I.Position doesn’t update and remains at zero.
The is expected behavior as the CMR limit is
131072 based on the following formula
CMR = (CNR_N / CNR_D) * CPR where CPR =
262,144
1 4 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 8 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 16 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 32 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 64 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 128 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 256 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 512 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 1024 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 2048 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 4096 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 65535 262,144 Pass Pass Pass Outside CMR Limit – See description above
1 65536 262,144 Pass Pass Pass
Message Instruction Errors – this is expected
operation