Rockwell Automation 1771-QB Linear Pos. - Manual (Page 30)

Chapter
4
4Ć1
Hardware Description
This chapter describes the Linear Positioning Module hardware, as well as other
hardware required for a positioning system.
Figure 4.1 shows the three indicators on the module.
Figure 4.1
Indicators
50009
LINEAR
POSITIONING
FAULT
LOOP1
ACTIVE
LOOP2
ACTIVE
When you first power up the module, all three indicators turn on for about one
second. Next, the LOOP 1 ACTIVE and LOOP 2 ACTIVE indicators turn off
while the module performs diagnostics. If the diagnostics discover a module
fault, the red FAULT indicator stays on and the module remains inactive. When
the programmable controller is in run mode, the indicators behave as follows:
FAULT - a red indicator that is normally off. The indicator turns on if there
is a module fault in one loop or both loops. See Chapter 11 for more
information on module faults.
LOOP 1 ACTIVE - a green indicator that is on when loop 1 is active. The
indicator blinks if a fault occurs on loop 1 and turns off if loop 1 is inactive.
LOOP 2 ACTIVE - a green indicator that is on when loop 2 is active. The
indicator blinks if a fault occurs on loop 2 and turns off if loop 2 is inactive.
Indicators