Yamato Scientific Hitech controller type Ⅳ - Manual (Page 33)

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4. SAFETY MEASURES AND PRECAUTIONS
This section discusses the safety measures provided for Model High-Tech IV
Programmable Controller, and the operational precautions of the controller and your
system regulated by the controller. See the operating instructions of your system,
which also describe safety measures and precautions.
4.1 POST Function
POST stands for Power On Self Test, which is a special function to check the
controller's microprocessor, memory, peripheral LSI's and peripheral circuits whenever
you turn on Power key. With this POST function, you can make sure that the controller
is free of serious troubles before starting operation.
If the function defects something abnormal, the sub display shows one of error codes
corresponded to the trouble from among error codes of
, and
.
These error codes mainly indicates a trouble of electronic circuits If this is the case,
turn off the breaker and contact the dealer of your system, Yamato Scientific CD., Ltd.
or Yamato Engineering Co., Ltd. in your vicinity.
4.2 Precautions
1) To prevent overheating, Model High-Tech IV Programmable Controller is equipped
with automatic attempering function In addition, some of our systems also have their
own attemperators in the circuit separated from the programmable controller.
However, when you are working on exothermic samples or supplying electricity to
samples to generate heat, those temperature regulating systems do not work
effectively.
When temperature goes up abnormally high, shut down power supply or take any other
appropriate measures Yamato Scientific is prepared to modify your system to manage
such troubles.
2) In case of power failure, the programmable controller of the standard specifications
automatically resets itself and restarts operation when electric power becomes
available again. If you install the optional Restart Selector Function In the controller,
you can select either Automatic Reset or Manual Reset to restart operation after power
failure for a certain period of time.