User`s manual

34
7.2 CC-Link Interface Card LEDs
This section describes the failures, causes, and corrective actions indicated by the LEDs on the SI-C card.
Confirm the following when communications are halted during operation.
• The SI-C card and the twisted pair cable are attached correctly.
Check that there is no faulty contact or disconnection.
• The PLC program has been executed without a failure. The PLC CPU has not been stopped.
• Data communications are not interrupted because of failures such as momentary power loss.
LED Display
Remote Device Station (SI-C)
Master
Unit
Station
No. 1
Station
No. 2
Station
No. 3
Cause Corrective Action
L.RUN
SD
RD
L.ERR
∗
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
∗
Station No. 1 and 3 use the
same inverter station
number.
Turn ON the power supply
again after correcting the
inverter station numbers.
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The SI-C baud rate setting
of Station No. 2 is different
from the setting of the
master unit.
Correct the baud rate setting
and turn ON the inverter
power supply again.
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The settings of the SI-C
switches of station No. 3 are
changed after the power
supply is turned ON.
Return the SI-C switches to
the original positions, or
turn ON the inverter power
supply again.
TIME
LINE

or
TIME

LINE

L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The settings of the SI-C
switches of station No. 1 are
out of the range (B.RATE:
5 to 9, STA: 65 or more).
Correct the settings of the
SI-C switches and turn the
power supply ON again.
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The SI-Cs of two stations
are affected by noise.
L.RUN may be
extinguished.
Ground each inverter and
master unit FG.
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
The transmission cable is
affected by noise between
the inverters of node 2 and
3. L.RUN may be
extinguished.
Confirm the SLD
connection of the
transmission cable. Also
separate the cable from the
power cable as much as
possible by at least 100mm.
TIME
LINE

or
TIME

LINE

L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
L.RUN
SD
RD
L.ERR
Failed to attach a
termination resistor.
L.RUN may be
extinguished.
Confirm that the
termination resistor is
attached.
:
Lit
:Blinking  :
Not lit ∗: Lit or Not lit