Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 187)

Publication 1760-UM001D-EN-P - September 2005
Troubleshoot Your Controller 10-3
Event
Relay output ‘Q’ does not
switch and activate the load Pico in Stop mode Select Run mode
No voltage at relay contact Check installation
instructions, and
external wiring.
Pico power supply interrupted
Pico circuit diagram does not
activate relay output
Broken wire
Pico relay is faulty Replace the Pico
Possible Situations When
Creating Circuit Diagrams Explanation Remedy
Event Explanation Remedy
The actual values are not
being stored retentively. Retention has not been
enabled. Enable retention in the
SYSTEM menu.
The RETENTION… menu is
not displayed in the
SYSTEM menu. Pico is in Run mode Select Stop mode.
The SYSTEM menu is not
displayed. Pico is password protected Unlock Pico’s password.
Pico starts only in Stop
mode No circuit diagram in Pico Load an input circuit
diagram.
Start-up behavior is set to
the function “Start-up in
operating mode STOP”. Set the start-up behavior in
the SYSTEM menu.
LCD display showing
nothing No power supply Switch on the power supply.
Pico is faulty Press the Ok button. If no
menu appears, replace the
Pico.
Text displayed with too
many spaces Enter text.