Environmental Problem - Toshiba PROSEC T1-16S User Manual

10.1.6 Environmental problem

If the following improper operations occur in the controlled system, check possible
environmental factors.
(1) If an improper operation occurs synchronously with the operation of I/O devices:
The noise generated at ON/OFF of the output device (load) may be the cause of
the problem. Take necessary measures mentioned in section 3.
(2) If an improper operation occurs synchronously with the operation of surrounding
equipment or high-frequency equipment:
The noise induced in I/O signal lines may be the cause of the problem. The surge
voltage, voltage fluctuations, or differences of grounding potentials may cause
the problem, depending on the power supply system or the grounding system.
Check the operation in accordance with the precautions in section 4. For some
cases, isolation from the ground may lead to the stable operation.
(3) If an improper operation occurs synchronously with the operation of machinery:
The vibration of the equipment may cause the problem. Check that the installation
status of the units and take necessary measures.
(4) If a similar failure is repeated after the unit is replaced:
Check that no metal debris or water drops has been entered into the unit/module.
Apart from the above points, consider climatic conditions. If the ambient temperature
is beyond the specified range, stable operation of the system is not guaranteed.
10. Troubleshooting
Basic Hardware and Function
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