7-2
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<7. I/O Communications >
IM 34M6H28-01E
1st Edition : Feb.01,1999-00
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Register and Save
The scan list and transmission time interval (see Section 7.5, “Transmission Time Interval”)
are registered in the memory using the Register Device/Register Transmission Time Inter-
val commands of the Tool commands (see Section 9.1.4 of this manual for details on the
commands) using a Ladder/BASIC program in the CPU module. These are stored in the
flash memory with the Store in Flash Memory command. The information which is stored in
the flash memory is preserved even if the power supply is turned off.
CAUTION
One can write to flash memory 100,000 times. Make sure that the Ladder/BASIC program
that performs flash memory storage is not created every time operation starts.
Create the program for registration/saving by referring to the programming example (Sec-
tion 9.3, “Sample Program”).
(Ladder/BASIC)
Register program
(Ladder/BASIC)
Save program
Tool command
I/O and message
communications use
information in the memory
When the module
is started, data are read from
flash memory into memory.
Scan list
Transmission
time interval
Scan list
Transmission
time interval
I/O communication
Message communication
Memory
Flash memory
CPU module
This module
Request to store in Flash Memory
Request to register device
Register transmission time
F0701.EPS
Figure 7.1 Register and Save Sequence
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