Allen-Bradley FLEX I/O 1794-IP4, Руководство пользователя, Страница: 61 / 70

Chapter
7
Publication 1794-6.5.16 – September 1998
Use this chapter to troubleshoot the pulse counter module by
interpreting the indicators.
The module contains indicators for each of the following:
A B C
4 CH PULSE COUNTER MODULE
1794–IP4
Allen-Bradley
0 1 2 3
P N P N P N P N P D P D P D P D
0 1 2 3
A = Power/status indicator – indicates power applied to module and
status of module.
Red – indicates initialization of internal logic at powerup
Green – indicates initialization of internal logic is complete
and correct
B = Insertable label for writing individual I/O assignments.
C = Status Indicators –
Indication Color Description
P Yellow When on, indicates the input is active
N Yellow
When on, indicates the input is configured for 16–bit period
time measurement and 16–bit accumulating pulse counter
function
D Yellow
When on, indicates the input is conrfigured for 32–bit period
time measurement
To find out more about the IP4 module:
specifications on the IP4 module
See appendix A
For
Specifications
A
What This Chapter
Contains
Status Indicators
What’s Next
Allen-Bradley HMIs