Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 91)

Troubleshooting
Chapter 7
7Ć7
In Table 7.C, the numbers in parentheses are figure references. In
this example, both messages refer to Figure 6.11. Therefore, place a
bookmark at Table 7.D and go to that figure.
4. Figure 6.11 shows station 2 active connections for both chassis:
Left Active connects to terminal 5 of field wiring arm for module
group 0, slot 1 in chassis A.
Right Active connects to terminal 5 of field wiring arm for module
group 0 slot 1 in chassis B.
Since you learned in step 3 that the problem relates to chassis B, you can
concentrate on the Right Active connection.
5. To further isolate the problem, place a bookmark at Figure 6.11 and
return to Figure 7.3. The next question in this figure asks: Does the
problem relate to an input switch or connection? In this example,
your answer is yes, which leads you to another question. Does the
status indicator for the input to the 1771-IA module respond
correctly? (See Figure 7.1).
6. Figure 7.1 shows you where to find the input status indicators. For
this example, assume that the input status indicator in chassis B for
module group 0 slot 1, terminal 5 is off.
As shown in Figure 6.11, the Right Active connection is jumpered as
long as Plug-In Operator Station 2 is plugged in. Therefore, the
indicator for Right Active should be on.
7. Return to NO TAG. Since this indicator is off, your answer is no to
the question: Does the input status indicator respond correctly?
NO TAG tells you to replace the input switch or check its wiring.
8. Correct the problem after first opening and locking the main power
disconnect. Inspect and test the Right Active connection (Figure
6.11). For this example, you find a broken wire in Plug-In Operator
Station 2. Repair the broken wire then, close the main disconnect and
return the press to normal operation.