Led Status - Panasonic MEWNET-F Technical Manual

9.6 LED Status

Check the CPU, master unit, slave unit, I/O terminal board, I/O terimnal unit and FP I/O link unit for the
ON/OFF status of their LEDs, then find the cause fo teh error by referring to the table below.
LED status when the system is turned on
*The CPU of the master station must be started after it is set to the "PROG. mode".
CPU Master
PROG.
LED
(ON)
PROG.
LED
(Flashing)
ERROR
LED
(ON)
Slave station
COMM./ COMM./
COM. LED COM. LED
(Flashing) (Flashing)
COMM./ COMM./
COM. LED COM. LED
(Flashing) (Flashing)
ALARM LED
(ON)
ALARM LED ALARM LED
(OFF) (ON)
COMM. LED
(ON)
COMM./
COM. LED
(Flashing)
ALARM LED
(Flashing)
COMM./
COM. LED
(Flashing)
Contents
Normal
There is a slave
station which is not
activated although its
I/O numbers are
registered in the CPU.
("Slave station
connection wait mode"
is activated.Even if the
CPU goes to the RUN
mode, the operation
will not start.))
Temporary error
caused by noise.
(Self-diagnostic code
E41)
Error on the master
unit.
(Self-diagnostic code
E41)
Temporary error
caused by noise.
Error on the slave
station.
More than 4 master
units are installed.
CPU version is not ver.
2.0 or later.
(When using FP3
CPU)
Units which cannot be
used for the
MEWNET-F are
installed on a slave
station system.
(Self-diagnostic code
E35)
Terminal stations are
not assigned correctly.
(Self-diagnostic code
E51)
Actions
Turn on the power of the
slave stations which is
not activated.
Check the
communication cable to
see if it is correctly
connected.
Make sure all of the
slave stations registered
in the CPU are
connected.Match all of
teh settings, then restart
again.
Restart the system.
Please contact us.
Restart the system.
Please contact us.
Remove extra master
units, then restart the
system.
Use a CPU whose
version is Ver. 2.0 or
later.
(When using FP3 CPU)
Reconfigure the slave
station. Remove any unit
which cannot be
installed on the station.
Both ends of
communication path
should be terminal
stations.
9-21