Rockwell Automation 1785 PLC-5 User Manual download pdf (Page 19)

Publication 1785-10.5 - November 1998

Chapter

Troubleshoot the Processor System

Use the PLC-5 Processor

Status Indicators

Troubleshoot General Problems

Use the PLC-5 Processor

Status Indicators

(page 4-1)

BATT

PROC

FORCE

COMM

Indicator Color Description Probable Cause Recommended Action

BATT Red Battery low Battery low Replace battery within 10 days

Off Battery is good Normal operation No action required

PROC Green

(steady)

Processor is in run

mode and fully

operational

Normal operation No action required

Green

(blinking)

Processor memory is

being transferred to

EEPROM

Red

(blinking)

Major fault Run-time error • Check major fault bit in status file

(S:11) for error definition

• Clear fault bit, correct problem,

and return to run mode

Red

(steady)

Major fault • Processor memory

has checksum

error

• Memory module

error

• Internal

diagnostics have

failed

• Clear memory and reload program

• Check backplane switch settings

and/or insert correct memory

module

• Power down, reseat processor

and power up; then, clear

memory and reload your program.

Replace EEPROM with new

program; then, if necessary,

replace the processor

Off Processor is in

program load or test

mode or is not

receiving power

Check power supply and

connections

BATT

PROC

FORCE

COMM

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