Rockwell Automation 1771-QB Linear Pos. - Manual (Page 166)

Troubleshooting
Chapter 11
11Ć4
4. Connect the -GATE terminal (3/4) to the -INTERR terminal (7/8).
5. Power up the axis and check the status block for feedback faults.
If you still experience feedback faults, make sure that your transducer power
supply is providing +5 VDC (+5%) through terminals 9 and 10 on the module’s
wiring arm.
If there aren’t any feedback faults, then the problems originated in the
transducer or the cabling. Check the cable by performing the loopback test
again with the gate and interrogate lines connected at the far end of the cable
instead of at the module.
The flowchart in Figure 11.2 provides a logical procedure to help you isolate a
problem with the Linear Positioning Module. You can also use it at system
startup to check out the module for proper operation. Numbered explanatory
notes follow the flowchart. Many of the flowchart boxes that specify corrective
actions contain more than one instruction. When using the flowchart, perform
instruction 1 first. If this fails to correct the problem, perform instruction 2, and
so on.
Your ladder diagram program should allow you to display parameter, setpoint,
motion, command and status blocks on an industrial terminal.
Troubleshooting Flowchart