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DANGER
CAUTION
z SAFETY PRECAUTIONS z
(Read these precautions before using.)
When using this equipment, thoroughly read this manual. Also pay careful
attention to safety and handle the module properly.
These precautions apply only to this equipment.
Refer to the user’s manual of the CPU module to use for a description of the
PLC system safety precautions.
These "Safety Precautions" classify the safety precautions into two categories:
"DANGER" and "CAUTION".
Procedures which may lead to a dangerous condition and
cause death or serious injury, if not carried out properly.
Procedures which may lead to a dangerous condition and
cause superficial to medium injury, or physical damage
only, if not carried out properly.
Depending on circumstances, procedures indicated by
CAUTION
may also
be linked to serious results.
In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it
whenever necessary. Always forward it to the end user.
[DESIGN PRECAUTIONS]
DANGER
z Some failures of the GOT main unit, communication module,
communication board or cable may keep the outputs on or off.
An external monitoring circuit should be provided to check for output
signals which may lead to a serious accident.
Not doing so can cause an accident due to false output or malfunction.
z If a communication fault (including cable disconnection) occurs during
monitoring on the GOT, communication between the GOT and PLC CPU is
suspended and the GOT becomes inoperative.
For bus connection: The CPU becomes faulty and the GOT inoperative.
For other than bus connection: The GOT becomes inoperative.
A system where the GOT is used should be configured to perform any
significant operation to the system by using the switches of a device other
than the GOT on the assumption that a GOT communication fault will
occur.
Not doing so can cause an accident due to false output or malfunction.