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Mitsubishi Electric GOT2000 Series Connection Manual Page 4

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[DESIGN PRECAUTIONS]
When the GOT backlight has a failure, the GOT status will be as follows. Failure to observe this
instruction may result in an accident due to incorrect output or malfunction.
• GT27, GT25, GT23
The POWER LED blinks (orange/blue), the display section dims, and inputs by a touch switch are
disabled.
• GT2105-Q
The POWER LED blinks (orange/blue), and the display section dims. However, inputs by a touch
switch are still available.
• GT2107, GT2104-R, GT2104-P, GT2103-P
The display section dims. However, inputs by a touch switch are still available.
Even if the display section dims, inputs by a touch switch may still be available. This may cause an
unintended operation of the touch switch.
For example, if an operator assumes that the display section has dimmed because of the screen
save function and touches the display section to cancel the screen save, a touch switch may be
activated.
The GOT backlight failure can be checked with a system signal of the GOT. (This system signal is
not available on GT2107, GT2104-R, GT2104-P, and GT2103-P.)
The display section of the GOT is an analog-resistive type touch panel.
When multiple points of the display section are touched simultaneously, an accident may occur due
to incorrect output or malfunction.
• GT27
Do not touch three points or more simultaneously on the display section. Doing so may cause an
accident due to an incorrect output or malfunction.
• GT25, GT23, GT21
Do not touch two points or more simultaneously on the display section. Doing so may cause a
touch switch near the touched points to operate unexpectedly, or may cause an accident due to
an incorrect output or malfunction.
When programs or parameters of the controller (such as a PLC) that is monitored by the GOT are
changed, be sure to reset the GOT, or turn on the unit again after shutting off the power as soon as
possible.
Not doing so can cause an accident due to false output or malfunction.
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 (GT27, GT25 Only) : The CPU becomes faulty and the GOT becomes
For other than bus connection
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.
To maintain the safety of the system incorporating the GOT, take measures against unauthorized
access from external devices via a network.
To maintain the safety against unauthorized access via the Internet, take measures such as installing
a firewall.
A - 2
WARNING
inoperative.
: The GOT becomes inoperative.

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