Communication Stops During Operation - Mitsubishi Electric FR-E5NC Instruction Manual

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
Master Inverters (FR-E5NC)
unit
Station 1 Station 2
L. RUN $
L. RUN
*
SD SD
"
RD RD
L. ERR $ L. ERR $
"
L. RUN $
L. RUN
"
SD SD
"
TIME $
RD RD
LINE $ L. ERR $ L. ERR $
"
or
L. RUN L. RUN
"
"
TIME SD SD
"
LINE $
RD RD
L. ERR $ L. ERR $
L. RUN $
L. RUN
$
SD SD
"
RD RD
"
L. ERR $
L. ERR
Station 3
"
L. RUN $
Since the L.RUN LEDs of the FR-E5NC on
"
*
SD station 1 and the FR-E5NC on station 3 are off,
" "
RD the station numbers of the inverters set as
L. ERR $
stations 1 and 3 are the same.
"
L. RUN Since the L.RUN and SD LEDs of the FR-E5NC
"
$
SD on station 2 are off, the transmission speed
" "
RD setting of the FR-E5NC on station 2 is wrong
L. ERR $
within the setting range (0 to 4).
" "
L. RUN
Since the L.ERR LED of the FR-E5NC on station
" "
SD
3 flickers, the setting switch of the FR-E5NC on
" "
RD
station 3 was moved during normal operation.
L. ERR #
Since the L.RUN and SD LEDs of the FR-E5NC
" "
L. RUN
on station 1 are off and its L.ERR LED is on, the
" "
SD
setting switch setting of the FR-E5NC on station
" "
RD
1 is outside the range (transmission speed: 5 to
L. ERR $
9, station number: 65 or more).
HOW TO CHECK FOR ERROR USING THE LEDS
Cause
51
Corrective Action
After correcting the repeated
station numbers of the inverters,
switch power on again.
After correcting the transmission
speed setting, switch power on
again.
After returning the setting switch of
the FR-E5NC to the original
position, power on the inverter
again.
After correcting the setting switch
position of the FR-E5NC, switch
power on again.