Basic Diagnostics; Batt Led On; Error Led Flashes (Program Error) - Mitsubishi Electric MELSEC FX2NC-16MT-D/UL Hardware Manual

FX2NC Series Programmable Controllers
7.2

Basic diagnostics

The following diagnostic functions will help identify, common faults.
7.2.1

BATT LED ON

Fault
POWER
RUN
BATT LED
BATT
ON
ERROR
7.2.2

ERROR LED flashes (PROGRAM ERROR)

Fault
POWER
ERROR
RUN
LED
BATT
flashes
ERROR
Remedy
Monitor
M8006 Possible
with a pro- results
gramming
tool.
Remedy
Possible
C h e c k
results
BATT LED.
If the current program and/or date is
stored only in the PCs RAM, copy
M8006:ON
and store this immediately. Proceed
to replace the PCs battery.
Monitor D8005. This is the current
battery voltage (in 0.1V units). Con-
M8006:OFF
tact a Mitsubishi service center for
further consideration of the problem.
Is the BATT OK?
Work through BATT diagnostic. If the
LED OFF BATT LED is cured yet the ERROR
LED still flashes check for a program-
ming problem.
LED is lit Check for programming problem.
Diagnostics 7.
7-2