Keyence DL-PN1 User Manual download pdf (Page 29)

- PROFINET Communication Unit DL-PN1 User's Manual (IB) -

Troubleshooting

The indicator LEDs on the DL-PN1 can be used to determine the causes of errors.

 Link/activity indicator (LINK/ACT)

This indicator indicates whether the DL-PN1 is communicating correctly.

 System Failure indicator (SF)

This indicator indicates whether the DL-PN1 is operating normally.

Link/activity indicator (Green)

System Failure indicator (Orange, Red)

Bus Failure indicator (Red)

Sensor communication indicator (Green, Red)

LED Status Condition Corrective Action

Green

Solid The DL-PN1 is normally linked. -

Flashing

The DL-PN1 is normally linked and is

now exchanging data.

Not lit

Power is not supplied to the DL-PN1.

The DL-PN1 is not linked.

• Check if the power supply is correctly connected.

• Check if the DL-PN1 is correctly connected to the

sensor amplifier.

• Check if the IP address is correct.

• Check if the power supply of the connected device

or Ethernet switch is correctly connected.

• Check if the cable is correctly connected.

LED Status Condition Corrective Action

Solid red

There may be a system error on the

DL-PN1 or a connected sensor.

• Check the D-bus LED status.

• Check if the number of connected sensor

amplifiers exceeds the maximum number of

connectable units.

• Check if the IP address is correct.

• Check if the slot number is correct.

• Check if the DL-PN1 is correctly connected to the

sensor amplifier.

• Check if there is an electrical noise source near the

DL-PN1.

Flashing orange

Flash LED was requested on the I/O

controller.

Flashes approximately 4 times per

second.

Not lit The DL-PN1 is normally operating. -

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Keyence DL-PN1 User Manual Page 29

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