Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 370)

Chapter 20
Troubleshooting Your System
20–2
When an Error Exists
If an error exists within the controller, the controller LEDs operate as
described in the following tables.
The
Following
Error Exists
Probable Cause Recommended Action
No input
er r
No Line Power
Verify proper line voltage and connections to the
controller.
power or
power supply
error
Power Supply Overloaded
This problem can occur intermittently if power
supply is overloaded when output loading and
temperature varies.
The
Following
Error Exists
Probable Cause Recommended Action
Hardware
fa
Controller Memory Error
Cycle power. Contact your local Allen-Bradley
representative if the error persists.
fault
Loose Wiring Verify connections to the controller.
The
Following
Error Exists
Probable Cause Recommended Action
Application
fault Hardware/Software Major
Fault Detected
1. Monitor Status File Word S6 for major error
code.
2. Remove hardware/software condition causing
fault.
3. Use the hot key sequence FAULT - DEL to
clear the fault.
4. Attempt to enter RRUN, RCSN, or RSSN
mode. If unsuccessful, repeat recommended
action steps above or contact your local
Allen-Bradley distributor.
If the LEDs indicate:
FAULT
FORCE
POWER
RUN
If the LEDs indicate:
FAULT
FORCE
Й ЙЙ Й Й ЙЙ
POWER
RUN
Й Й
ЙЙ
ЙЙ
Refer to the following key to determine
the status of the LED indicators:
Indicates the LED is OFF.
Indicates the LED is ON.
Indicates the LED is FLASHING.
Status of LED does not matter.
If the LEDs indicate:
FAULT
FORCE
ЙЙ
Й
Й
ЙЙ
ЙЙ
Й
Й
Й
Й
ЙЙ
ЙЙ
POWER
RUN
Й
Й
Й
Й