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[Design Precautions]
WARNING
● Do not write data into the "system area" of the buffer memory of intelligent function modules.
Also, do not use any "use prohibited" signals as an output signal to an intelligent function module
from the programmable controller CPU.
Writing data into the "system area" or outputting a signal for " use prohibited" may cause a
programmable controller system malfunction.
CAUTION
● Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other.
They should be installed 100 mm (3.94 inch) or more from each other.
Not doing so could result in noise that may cause malfunction.
● When using the module while values, such as buffer memory set values, are registered in the Flash
ROM, do not turn off the power supply for the module loading station nor reset the programmable
controller CPU.
If the power supply for the module loading station is turned off or the programmable controller CPU is
reset while any values are registered, the data contents in the Flash ROM become inconsistent and
as a result the values must be set again in the buffer memory, etc. and reregistered to the Flash
ROM.
Also, this may cause failure and malfunction of the module.
● If a BASIC program is registered in the flash ROM in the module, do not power OFF or reset the
programmable controller CPU at the station where the module is installed during registration.
If it is performed during registration, the data contents in the flash ROM will be erratic and it will be
necessary to reset the setting values, etc. in the buffer memory and register them again in the flash
ROM. It could also cause the module to break down or malfunction.
● When changing the operating status of the programmable controller CPU (such as remote
RUN/
STOP) from the external device, select "Always wait for OPEN (Communication possible at STOP time)"
for the "Initial timing" setting in the network parameter. The communication line will be closed when "Do
not wait for OPEN (Communications impossible at STOP time)" is selected and the remote STOP is
executed from the external device. Consequently, the programmable controller CPU cannot reopen the
communication line, and the external device cannot execute the remote RUN.
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