Specifications

4-28 Programming Guide/Tips
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The value of
a
defines the specific function.
The data from
d1
through
dk
determines the number of bytes used by each command, but it is
not necessary to specify these parameters in some cases. Carefully check the specification
procedure for the command function you are using.
Customization of the NV Area
The
GS ( E
command can change the size of the NV user memory and NV bit image memory for
a particular application. The allowable settings are described below. Please note that no models
are currently being sold with “no expansion ROM.”
Model with expansion ROM
Model with no expansion ROM
When the total of both specified values exceeds the installed size, the NV bit image memory area
is adjusted automatically to a size that does not exceed the total memory.
When you change the settings with this command, the new setting becomes valid after one of
the following operations is performed:
❏
Sending of command function 2, ending user setting mode and performing a reset (the
recommended operation).
❏
Turning on the power
❏
Resetting hardware with the reset signal
Changing the setting clears all data in the area for which a change was made. Accordingly, be
careful not to execute this command unless you are sure you want to make a change.
Command Usage Example
This section describes the actual procedure to customize the data area.
Step 1: changing to user setting mode
Send the following command (in decimal numbers):
GS ( E 3 0 1 73 78
NV User Memory Area NV Bit Image Area
1KB 384KB or less
64KB 256KB or less
128KB 128KB or less
192KB 0KB
NV User Memory Area NV Bit Image Area
1KB 192KB or less
64KB 64KB or less