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47
LED On/Off Operations
2
OPERATION AND CONTROL
(3) When communication stops during operation
•
Check that the CC-Link dedicated cables are connected properly.
(Check for poor contact, cable breakage, etc.)
•
Check that the PLC program is executed without fault.
• Check that data communication is made without interruption due to an
instantaneous power failure, etc.
!
: On,
#
: Off, : Flicker, *: Any of on, flicker and off
LED States
Cause Corrective Action
Master
module
Inverters
Station
No. 1
Station
No. 2
Station
No. 3
TIME
#
LINE
#
or
TIME
!
LINE
#
L.RUN
#
SD *
RD
!
L.ERR #
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
#
SD *
RD
!
L.ERR #
Since the L.RUN LEDs
of station No. 1 and 3
inverters are off, the
station numbers of
station No. 1 and 3
inverters are the same.
Switch power on again
after assigning different
station numbers to the
inverters having the
same station numbers.
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
#
SD
#
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
#
Since the L.RUN and
SD LEDs of station No.
2 inverter are off, the
transmission speed
setting of station No. 2
inverter is incorrect
within the setting range
(0 to 4).
Set correct
transmission speed
and power on the
inverter again.
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
Since the L.ERR LED
of station No. 3 inverter
is flickering, the station
number (Pr. 503) of
station No. 3 inverter
was changed during
normal operation.
Return the station
number (Pr. 503) of the
inverter to the original
value and power on the
inverter again.
TIME
!
LINE
!
or
TIME
#
LINE
!
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
!
L.RUN
!
SD
!
RD
!
L.ERR
#
Since the L.ERR LED
of station No. 2 inverter
is on, station No. 1
inverter is affected by
noise.
(The L.RUN LED may
become off.)
Securely earth the FG
terminals of the
inverters and master
module.
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
!
L.RUN
!
SD
!
RD
!
L.ERR
!
Since the L.ERR LEDs
of station No. 2 and 3
inverters are on, the
transmission cable
between these
inverters is affected by
noise. (The L.RUN LED
may become off.)
Check the connection
of SLD of the
transmission cable.
Also, run the cable as
far away as possible
from the power line.
(More than 100mm)
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
#
L.RUN
!
SD
!
RD
!
L.ERR
!
You forgot to fit the
terminating resistor.
(The L.RUN LED may
become off.)
Check whether the
terminating resistor is
fitted or not.