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Setting the NV Configuration from the NV-Designer Section 6-2
Note (1) Word Area
Sets the memory area and first address of the area of memory used to
read/write data in word units, such as for the screen number.
(2) Bit Area
Sets the memory area and first address of the area of memory used to
read/write data in bits, such as for the automatic backlight OFF function.
Refer to 6-2-3 System Memory.
6-2-3 System Memory
System Memory The PT is constantly communicates with the internal memory of the PLC. The
PLC internal memory is divided into the following two areas.
■ System Memory
The system memory is used to control the system, such as for specifying the
screen number or backlight status. The specified words in the PLC memory
are allocated for communications, which are performed constantly.
■ Communications Addresses for Parts
The addresses used by parts can be specified freely. Communications are
performed only for the addresses used by the parts displayed on the screen.
Word Area Bit Area
Item Description
1 Area Click the Area Box and select an area from the pull
down menu.
2 Channel No. (i.e., word
address)
Enter the address directly or by using the keypad.
Corrections can be made by clicking the Back or
Clear Button.
3 Bit Number (When
setting Bit Area)
Precaution for Correct Operation
Do not allocate words that are used for real I/O to the Bit Area in system mem-
ory. The output status for allocated bits may turn ON or OFF, or the operation of
the PT may change when an input turns ON or OFF.
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