Chapter 4. troubleshooting and technical support, Troubleshooting – Comtrol IOLM Modbus TCP User Manual
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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:
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4.2. Contacting Technical Support
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4.1. Troubleshooting
Before contacting Technical Support, you may want to try the following:
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Open the IO-Link Master web interface and review the following web pages:
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IO-Link Diagnostics
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EtherNet/IP Diagnostics
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Modbus/TCP Diagnostics
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Reboot the IO-Link Master
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Verify that you are using the correct types of cables on the correct connectors and that all cables are
connected securely.
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Check to make sure LEDs are not reporting an issue usingIO-Link Master 4-EIP User Guide
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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.
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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.
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Verify that the Ethernet hub and any other network devices between the system and the IO-Link Master
are powered up and operating.
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If you have a spare IO-Link Master, try replacing the IO-Link Master.