SMC Networks EX600-ED Series, Operation Manual

Page: 27 / 82

-26-
No.EX##-OMN0030-A
•DeviceNet
TM
status
LED display Content
OFF.
The power supply for control and input is OFF.
Green MS LED is ON and
NS LED is OFF.
Either of the following conditions:
•C
hecking the node address.
•
Communication error.
Green MS and NS LEDs are both ON.
Communication is normal.
Green MS LED is ON and
Green NS LED is flashing.
Connection is not established.
Red MS LED is ON.
A component failure inside the SI unit.
Green MS LED is ON and
Red NS LED is ON.
Fatal communication error. (Check the following items, and restart.)
•
Check/correct the node address.
•
Check if the communication speed of PLC is the same as that of the
slave. If they are not the same, correct them.
•
Check proper length of the cable.
•
Check the communication cable is not disconnected or loose.
•
Ensure that the terminal resistor is mounted properly.
Green MS LED is ON and
Red NS LED is flashing.
Minor communication error. (Check the following items, and restart.)
•
Check if the communication speed of PLC is the same as that of the
slave. If they are not the same, correct them.
•
Check proper length of the cable.
•
Check the communication cable is not disconnected or loose.
•
Ensure that the terminal resistor is mounted properly.
Red/Green MS LED is flashing
alternately. Then, Red/Green NS LED
is flashing alternately.
Flashes when performing self diagnosis test when the power supply
starts.
∗
: Refer to”Ttroubleshooting” (page 34), for the further details of countermeasures.