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HOW TO CHECK FOR ERROR USING THE LEDS
51
7.3 Communication Stops During Operation
!
Check that the CC-Link unit (FR-E5NC) and CC-Link dedicated cables are fitted properly. (Check for contact fault, open
cable, etc.)
!
Check that the programmable controller program is executing reliably and that the PLC CPU is running.
!
Check that data communication has not stopped due to an instantaneous power failure, etc.
LED States
Inverters (FR-E5NC)
Master
unit
Station 1 Station 2 Station 3
Cause Corrective Action
L. RUN
$
SD
*
RD
"
L. ERR
$
L. RUN
"
SD
"
RD
"
L. ERR
$
L. RUN
$
SD
*
RD
"
L. ERR
$
Since the L.RUN LEDs of the FR-E5NC on
station 1 and the FR-E5NC on station 3 are off,
the station numbers of the inverters set as
stations 1 and 3 are the same.
After correcting the repeated
station numbers of the inverters,
switch power on again.
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 the FR-E5NC
on station 2 are off, the transmission speed
setting of the FR-E5NC on station 2 is wrong
within the setting range (0 to 4).
After correcting the transmission
speed setting, switch power on
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 the FR-E5NC on station
3 flickers, the setting switch of the FR-E5NC on
station 3 was moved during normal operation.
After returning the setting switch of
the FR-E5NC to the original
position, 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.RUN and SD LEDs of the FR-E5NC
on station 1 are off and its L.ERR LED is on, the
setting switch setting of the FR-E5NC on station
1 is outside the range (transmission speed: 5 to
9, station number: 65 or more).
After correcting the setting switch
position of the FR-E5NC, switch
power on again.