This section contains troubleshooting information for your DeviceMaster EIP-MOD. You should review the following information before calling Technical Support because they will request that you perform many of the procedures or verifications before they will be able to help you diagnose a problem.

If you cannot diagnose the problem, you can contact Pepperl+Fuchs Comtrol, Inc. Technical Support.

Troubleshooting Checklist

The following checklist may help you diagnose your problem:

  • Verify that you are using the correct types of cables on the correct connectors and that all cables are connected securely.


    Most customer problems reported to Pepperl+Fuchs Comtrol, Inc. Technical Support are eventually traced to cabling or network problems.

  • Reboot the system and the device.

  • If you have a spare EtherNet/IP - Modbus device, try replacing the device.

General Network Troubleshooting

Review the following for general network troubleshooting.

  • Reset the power on the device and watch the Status light activity. If the device has a power switch, turn the device’s power switch off and on, while watching the LED diagnostics.

    If the unit does not have a power switch, disconnect and reconnect the power cord.

    1/2/4-Port PWR or Status LEDDescription
    5 sec. off, 3 flashes, 5 sec. off, 3 flashes ...Redboot checksum failure.
    5 sec. off, 4 flashes, 5 sec. off, 4 flashes ...SREC load failure.
    5 quick flashesThe default application is starting up.
    10 sec. on, .1 sec. off, 10 sec. on .1 sec. off ...The default application is running.
  • Reduce network traffic by installing a second NIC in the host and connect directly to the device.

  • Verify that the Ethernet hub, switch, or router and any other network devices between the system and the Pepperl+Fuchs Comtrol, Inc. device are powered up and operating.

  • Verify that the IP address programmed into the Pepperl+Fuchs Comtrol, Inc. device matches the unique reserved IP configured address assigned by the system administrator.

  • Verify that the network IP address is correct. If IP addressing is being used, the system should be able to ping the device.

Network Device Connectivity

You can use the table below to verify that you are using the correct cable in the proper connector.

Product TypeConnected toEthernet CableConnector Name

DeviceMaster EIP-MOD-2101

DeviceMaster EIP-MOD-2201

Hub, switch, router, or NICStandard10/100

DeviceMaster EIP-MOD-2102

Hub, switch, router, or NICStandard10/100

DeviceMaster EIP-MOD-2302

Hub, switch, router, or NICStandard10/100 - 1E/2E

DeviceMaster EIP-MOD-2304

Hub, switch, router, or NICStandard10/100 E1/E2

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