10. Troubleshooting
10.1.5Output check
If the output status monitored on the programming tool is normal but the external output device (load) is not operated normally, check the following points:
| Is the output status LED | |
| changed ON/OFF according | |
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No | to the program execution ? | |
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| Yes |
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| Check the voltage between | |
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| the output terminal and its | |
| common terminal. | |
| It should be 0 V when the | |
| output is ON, and it should | |
| be the circuit voltage when | |
| the output is OFF. | |
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| Normal |
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| Check the voltage at the load | |
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Check whether the I/O allocation table is identical to the actual I/O configuration
Not identical
Execute the automatic I/O
allocation, and check whether the I/O allocation table is now identical to the actual I/O configuration
Still not identical
Is the allocation mismatch for
a specific option card, I/O module, or expansion unit ?
No
Is the allocation mismatch for all I/O modules mounted on the expansion rack ?
If it is the circuit voltage at the output is ON, or if it is 0 V at the output is OFF with the load ON, the T1/T1S’s output circuit may be faulty.
If it is 0 V and the load is also OFF, check the output power and the output cable connections.
If it is not normal, check the output cable connections.
If it is normal, check the specification of the load, also check environmental factors.
If identical, the T1/T1S’s internal circuit or the output circuit may be faulty.
If it becomes identical, execute the EEPROM write operation.
If so, the card, module or expansion unit may be faulty. For expansion unit, check the expansion cable also.
If so, check the connection between the T1/T1S basic unit and the expansion rack. If not, the T1/T1S basic unit may be faulty.
298 T1/T1S User’s Manual
CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
