Comtrol IOLM Modbus TCP - Manual (Page 23)

IO-Link Master Modbus/TCP Reference Manual: 2000590 Rev. A Chapter 4. Troubleshooting and Technical Support - 25
Chapter 4. Troubleshooting and Technical Support
This section provides the following information:
• 4.1. Troubleshooting
• 4.2. Contacting Technical Support on Page 26
• 4.3. Using Log Files on Page 27
4.1. Troubleshooting
Before contacting Technical Support, you may want to try the following:
• Open the IO-Link Master web interface and review the following web pages:
- IO-Link Diagnostics
- EtherNet/IP Diagnostics
- Modbus/TCP Diagnostics
• Reboot the IO-Link Master
• Verify that you are using the correct types of cables on the correct connectors and that all cables are
connected securely.
• Check to make sure LEDs are not reporting an issue usingIO-Link Master 4-EIP User Guide
• Verify that the network IP address, subnet mask, and gateway are correct and appropriate for the
network. Make sure that the IP address programmed into the IO-Link Master matches the unique
reserved IP configured address assigned by the system administrator.
• If using DHCP, the host system needs to provide the subnet mask. The gateway is optional and is not
required for a purely local network.
• Verify that the Ethernet hub and any other network devices between the system and the IO-Link Master
are powered up and operating.
• If you have a spare IO-Link Master, try replacing the IO-Link Master.