Toshiba 6F3B0253 - Manual (Page 287)

6F3B0253
Basic Hardware and Function
285
10. Troubleshooting
10.1.4 Input check
If the program is running but the external input signal is not read normally, check the
following points:
Is the input status LED If not, check the input voltage at the
changed ON/OFF according T1-16S’s input terminals.
to the corresponding input If the voltage is not normal, check the input
device operation ? device and the cable.
If the voltage is normal, the T1-16S’s input
Yes circuit may be faulty.
Connect the programming If the monitored X device state is identical
tool, and monitor the to the state of the input status LED, the
corresponding X device state cause may lie in the user program or in the
in RUN mode environment.
Not normal
Check whether the X device If it is forced, release the force designation
is forced or not then execute the EEPROM write
operation.
Not forced
Check whether the I/O If identical, the T1-16S’s internal circuit or
allocation table is identical to the input circuit may be faulty.
the actual I/O configuration
Not identical
Execute the automatic I/O If it becomes identical, execute the
allocation, and check whether EEPROM write operation.
the I/O allocation table is now
identical to the actual I/O
configuration
Still not identical
Is the allocation mismatch for If so, the card, module or expansion unit
a specific I/O module? may be faulty. For expansion unit, check
the expansion cable also.