L-9517-9563-06-A_Data_sheet_ATOM_en.pdf - 第29页

29 A TOM miniature encoder system Set-up signal voltage proportional to incremental signal amplitude. Set-up (ACi interf aces and Ri digital interfaces) Set-up 1 (Ti digital interfaces only) V oltage at X 1 100% 0 0 Sign…

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28 ATOM miniature encoder system
Incremental
1
2 channels A and B in quadrature (90° phase shifted)
Reference
1
Signal period
Resolution
A
B
Z
Synchronised pulse Z, duration as resolution.
Bi-directionally repeatable.
2
Digital output signals
Form - Square wave differential line driver to EIA RS422A
All ACi interfaces, Ri digital interfaces, and Ti digital interfaces
1
Inverse signals not shown for clarity.
2
Only calibrated reference mark is bi-directionally repeatable.
29 ATOM miniature encoder system
Set-up signal voltage proportional to incremental signal amplitude.
Set-up (ACi interfaces and Ri digital interfaces)
Set-up
1
(Ti digital interfaces only)
Voltage at X
1
100%0
0
Signal level
1
Set-up signal as shown is not present during calibration routine.
Voltage at X
3.3V (nom)
50% 70% 100%0
0
Signal level
Between 50% and 70% signal level, X is a duty cycle.
Time spent at 3.3V increases with incremental signal level.
At >70% signal level X is nominal 3.3V.
30 ATOM miniature encoder system
3-state alarm ouput
Differentially transmitted signals forced open circuit for >15 ms when alarm conditions valid.
Alarm
1
Differential line driven alarm output (Ri digital interfaces and Ti digital interfaces)
E
>15 ms
Interface model Alarm asserted when
Ri0004
• < 40% signal
• Overspeed
Ri0008
Ri0020
Ri0040
Ri0100
• < 20% signal
• > 130% signal
Ri0200
Ri0400
Interface model Alarm asserted when
Ti
• < 20% signal
• > 135% signal
• Overspeed
1
Inverse signals not shown for clarity.
(ACi interfaces, Ri digital interfaces, and Ti digital interfaces)