Output Check - Toshiba PROSEC T1 User Manual

10. Troubleshooting

10.1.5 Output 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:
changed ON/OFF according
No to the program execution ?
Check the voltage between
the output terminal and its
It should be 0 V when the
output is ON, and it should
be the circuit voltage when
Check the voltage at the load
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
Still not identical
Is the allocation mismatch for
a specific option card, I/O
module, or expansion unit ?
Is the allocation mismatch for
all I/O modules mounted on
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T1/T1S User's Manual
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Is the output status LED
Yes
common terminal.
the output is OFF.
Normal
Check whether the I/O
configuration
No
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.