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Focus on DCS, PLC, robot control system and large servo system.
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| F3236 |
shooting Checklist If the device is not working properly, refer to Table 3‐7 for a checklist of problems, possible causes, and recommended actions to resolve the problem. Table 3-7 Troubleshooting Checklist Problem Possible Cause Recommended Action All LEDs are OFF. Loss of power. Ensure that the switch was installed properly according to the installation instructions in Chapter 2, Installation. Ensure that the power cords are connected properly to an active power source that meets the AC input specifications for this switch. Ensure that the AC power cord is not damaged. Replace the power cord with a known good one. No local management startup screen. Incorrect terminal setup. Refer to the Enterasys A4 CLI Reference for proper setup procedures. Improper Console cable pinouts. Refer to Figure 2-12 on page 2-18 for proper Console port pinouts. Corrupt firmware image, or hardware fault. If possible, attempt to download the image to the device again. Refer to the Enterasys A4 CLI Reference for details. Cannot navigate beyond startup screen. Improper Community Names Table. Refer to the Enterasys A4 CLI Reference for the Community Names Table setup. Cannot contact the switch through inband management. IP address not assigned. Refer to the Enterasys A4 CLI Reference for the IP address assignment procedure. Port is disabled. This is normal if the switch is a Member in a stack. If operating as a standalone switch or as the Manager in a stack, enable the port. Refer to the Enterasys A4 CLI Reference for instructions to enable/disable ports. No link to device. Verify that all network connections between the network management station and the device are valid and operating. If the problem continues, contact Enterasys Networks for technical support. Port(s) goes into standby for no apparent reason. Loop condition detected. Verify that Spanning Tree is enabled. Refer to the Enterasys A4 CLI Reference for the instructions to set the type of STA. Review the network design and delete unnecessary loops. If the problem continues, contact Enterasys Networks for technical support. User parameters (IP address, device and module name, etc.) were lost when the switch power was cycled. Clear NVRAM was set using CLI commands. Reenter the lost parameters as necessary. Refer to the Enterasys A4 CLI Reference for the instructions to configure the switch using CLI commands. If the problem continues, contact Enterasys Networks for technical support.
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