IAI America E-Con - Manual (Page 118)

110
6. RCS-C and E-Con
5.4 Troubleshooting
When a problem occurs in the CC-Link, check the operating condition with the table below to remove the cause.
When the ERR LED lights or flashes, or when the green LED turns off abnormally during communications, check
(or reset) connections of the power and communications cables, setting of rotary switches, and setting of
parameters before turning on the power to the controller main unit again.
ṯ: ON, ṳ: OFF, Ṳ: Flashing
RUN
(Green)
ERR
(Red)
SD
(Green)
RD
(Green)
Operating condition
ṯ Ṳ Ṳ ṯ
There is normal communications, but a CRC* error sometimes
occurs with noise.
ṯ 0.5sṲ Ṳ ṯ
There are normal communications, but the baud rate or station
setting switch malfunctions.
ṯ Ṳ Ṳ ṳ
(Impossible condition)
ṯ Ṳ ṳ ṯ
With the received data having a CRC* error, there can be no
response.
ṯ Ṳ ṳ ṳ (Impossible condition)
ṯ ṳ Ṳ ṯ Normal
communications
ṯ ṳ Ṳ ṳ (Impossible
condition)
ṯ ṳ ṳ ṯ
Local station address receiving data has not arrived.
ṯ ṳ ṳ ṳ (Impossible condition)
ṳ Ṳ Ṳ ṯ
There is the polling response, but refresh receiving has a CRC*
error.
ṳ Ṳ Ṳ ṳ (Impossible condition)
ṳ Ṳ ṳ ṯ
Local station address receiving data has a CRC* error.
ṳ Ṳ ṳ ṳ (Impossible condition)
ṳ ṳ Ṳ ṯ There is no link start-up.
ṳ ṳ Ṳ ṳ (Impossible condition)
ṳ ṳ ṳ ṯ
There is no local station address receiving data or it is impossible to
receive such data with noise. (Data volume is insufficient transmitted
from the master station.)
ṳ ṳ ṳ ṳ
It is impossible to receive data as a result of disconnection, etc.
ṳ ṯ ṳ ṯ, ṳ The baud rate or station number is invalid.
ṳ ṳ ṳ ṳ
There is a power interruption or there is a breakdown with the
remote station power supply part.
*CRC: Cyclic Redundancy Check
Data error detection method frequently used in the case of synchronous transmission is adopted.
6