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| CHAPTER2 Ethernet Unit | |
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No. | Symptom |
| Probable causes | Checkpoints | Action |
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| 7) | Wrong IP | • Check the settings after referring to “2- | • Redo the IP address, subnet mask and |
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| address, subnet | gateway settings correctly. Then turn |
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| mask or gateway | 3 Setting the subnet mask” p. 12, and | on the controller power again. |
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| settings on |
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| controller. |
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| 8) | Ethernet unit is | • Try substituting the Ethernet unit. | • If operation returns to normal, then the |
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| defective |
| Ethernet unit is probably defective, so |
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| replace the Ethernet unit. |
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2 | Cannot make | 1) | Wrong IP | • Check that the IP address of the | • Enter the correct IP address. |
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| TELNET |
| address used | controller you are attempting to |
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| connection or |
| during Telnet | connect with is correct. |
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| cannot |
| connection |
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| terminate the | 2) | Wrong Port No. | • Check that the port No. of the | • Enter the correct IP address. |
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| TELNET |
| used during | controller you are attempting to |
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| connection |
| TELNET | connect with is correct. |
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| right away. |
| connection. |
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| (ping reply is | 3) | The controller is | • When connected, the message “telnet is | • Await termination of current TELNET |
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| normal). |
| already logged in | already used!” appears. | connection. |
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| with another |
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| TELNET |
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| terminal. |
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| 4) | Alarm issued to | • Alarm message appears when | • Troubleshoot according to the type of |
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| controller. | connected. | alarm. |
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| • Connect the TPB and check for an |
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| alarm. |
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| • Status led is lit up in red. |
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| 5) IP address is the | • Check if the IP address and MAC | • If the IP address and MAC address do |
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| same as another | address have a correct match by using | not match each other, then the IP |
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| network device. | the “arp” command incorporated in the | address is wrong, so try redoing the |
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| OS. | settings. |
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| • Check all devices on the network to | • If found to be the same as another |
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| find if the same IP address is being | device, change the setting. |
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| used. |
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| 6) | Network traffic | • Check if the traffic load is appropriate. | • Change the network structure to get a |
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| (communication |
| smaller traffic load. |
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| data load) is too |
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| heavy. |
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3 | An OK does | 1) | Ethernet unit is | • See | • Enable the Ethernet unit and turn on |
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| not come |
| not enabled and | (p. 9) and check if the Ethernet Unit is | the power to the controller again. |
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| back after |
| not identified | enabled. |
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| login, or no |
| (recognized) by |
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| replay comes |
| controller. |
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| back even | 2) | I/O custom | • Check the I/O signal (Check on the | • Always use a pulse input for the |
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| after issuing a |
| command input | sequencer monitor, etc.) | custom command input. |
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| command. |
| signal is set ON. | • Communication error is issued when |
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| (Some unit |
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| TPB is connected to controller. |
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| control |
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| 3) | Commands such | • Reply comes back after axis movement | • When issuing TELNET commands, do |
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| commands |
| as origin return, | or writing data. | not run commands from the I/O or RS- |
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| are useable |
| axis movement |
| 232C. |
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| such as |
| commands, or |
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| LOGOUT or |
| data write |
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| BYE.) |
| commands are |
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| being run from |
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| I/O or RS/232C. |
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33
