SMC Networks ex250-sen1 Operation Manual page 26

Trouble No.12
Trouble Possible cause
The green SI
unit MS_LED Setting error.
flashes.
Trouble No.13
Trouble Possible cause
The SI unit
NS_LED goes IP address not set.
off.
Trouble No.14
Trouble Possible cause
The red SI unit
Duplicated IP
NS_LED lights
address.
up.
Trouble No.15
Trouble Possible cause
The red SI unit
Broken
NS_LED
communication line.
flashes.
Trouble No.16
Trouble Possible cause
The green SI Waiting for
unit NS_LED connection to be
flashes. established.
Investigation method of cause
Check the setting of the SI unit.
Investigation method of cause
Check the setting of IP addresses.
Investigation method of cause
Check that there is no duplicated IP
address.
Investigation method of cause
Check that there is no broken
communication line or loosened connector.
Check if the PLC is operating normally.
Investigation method of cause
Check the address and communication
setting.
Check that there is no broken
communication line or loosened connector.
Check if the PLC is operating normally.
-25-
Remedy
Review the setting of the SI
unit.
Remedy
Review the setting of IP
addresses.
Remedy
Review the setting of IP
addresses.
Remedy
Review the connection
condition of the
communication line. (If the
cable is broken, replace it
with a new one.)
Review the setting of PLC.
Remedy
Review the setting of the
switch and address.
Review the connection
condition of the
communication line. (If the
cable is broken, replace it
with a new one.)
Review the setting of PLC.
No.EX##-OMK0004-A