Allen-Bradley FLEX I/O 1794-ID2, Руководство пользователя, Страница: 76 / 84

8–2 Troubleshoot the Incremental Encoder Module
Publication 1794-6.5.15 – December 1998
Indicator Indication Explanation
A Yellow Input A active
Off Input A not active
B Yellow Input B active
Off Input B not active
Z Yellow Input Z active
Off Input Z not active
G Yellow Input G active
Off Input G not active
+ Yellow On when a positive pulse is detected; turns off
on negative pulse.
– Yellow On when a negative pulse is detected; turns off
on positive pulse.
OK Red Red during initialization after power turned on
Green Green when initialization is completed
When an input indicator (yellow) is lighted, it indicates that a valid
signal (active high or active low) is present at one of the Input
terminals.
To find out more about the ID2 module:
specifications on the ID2 module
See appendix A
For
Specifications
What’s Next