SMC Networks JXCD1, Operation Manual, Page: 83 / 89

- 82 -
No.JXC
※
-OMT0007-D
Problem
No.
Problem
Possible
causes
Investigation method and location
of possible causes
Countermeasures
1 LED is OFF.
Power fault
Is the green LED (PWR) on the
controller ON?
Check the voltage and current supplied
to the controller.
⇒
5. External Connections (P. 22 )
⇒
6. CN1: Power Supply Plug (P. 24 )
Incorrect
wiring
Is the wiring connected correctly?
Refer to the controller operation
manual to confirm wiring, and check
for broken wires and short-circuits.
Correct the wiring so that the input/output
of each signal is performed appropriately.
⇒
5. External Connections (P. 22 )
⇒
10.1 Memory allocation (P. 32 )
2
MS or NS is
on/ flashing
MS: Red
LED
flashes.
Check if the node address switch
or Data Rate switch is changed
when the power supply to the
motor controller is ON.
Change the node address switch and
Data Rate switch when the unit power
supply is OFF.
NS: LED is
OFF. Check if the master unit is
operating properly.
Refer to the Operation Manual for PLC.
NS: Green
LED
flashes
Communication not established
Check the following and restart.
- Signal line from PLC is connected
correctly.
- Communication speed of PLC is
appropriate.
- Wire the communication line away
from noise sources.
- The PLC is operating properly.
- The I/O area is within the area
permitted by the PLC.
NS: Red
LED
flashes
Communication timeout
Check the following and restart.
- Signal line from PLC is connected
correctly.
- Communication speed of PLC is
appropriate.
- Wire the communication line away
from noise sources.
- Cable length (main cable / branch
cable) is appropriate.
- Terminating resistors (121
Ω) are on
both ends of the branch cable only.
- The communication cable is not
broken, and there are no loose
connections between the
communication cable and connector.
- There should be no repeated bending
stresses or pulling forces.
NS: Red
LED is on
Duplication of node addresses
Set a node address to be unique.
Bus off detection
Check the following and restart.
- Signal line from PLC is connected
correctly.
- Communication speed of PLC is
appropriate.
- Wire the communication line away
from noise sources.
- Cable length (main cable / branch
cable) is appropriate.
- Terminating resistors (121
Ω) are on
both ends of the branch cable only.
- The communication cable is not
broken, and there are no loose
connections between the
communication cable and connector.
- There should be no repeated bending
stresses or pulling forces.