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Using a Memory Unit Section 3-5
Reference: When data is written to the NT631/NT631C, the data that has been stored up
until that point is lost. When the system program is changed, the operation of
NT631/NT631C also changes.
Method of Execution
Use the following procedure to write the screen data in the Memory Unit to the
NT631/NT631C by automatic transmission.
1,2,3... 1. Check that the NT631/NT631C power is OFF, then set the DIP switches on
the Memory Unit as follows after installing Memory Unit to NT631/NT631C.
It is not strictly necessary to set SW2-2 to OFF (to disable writing to the
Memory Unit), but it is recommended to do so to avoid loss of data in the
event of operating errors.
Reference: • Setting SW2-4 to ON (System/Screen transmitted simultaneously) dis-
ables the setting of SW1-4.
• Setting SW2-4 to ON (System/Screen transmitted simultaneously) dis-
ables the setting of SW2-3. In this case, the data transmission becomes
possible only if the data inside Memory Unit is in either of following combi-
nations.
Bank 0: system program, Bank 1: other than system program
Bank 0: other than system program, Bank 1: system program
If the combination is not as listed above, a data transmitting error occurs.
• When writing the system program into the NT631/NT631C, the type of
system program inside Memory Unit and the type of PT must correspond.
2. Switch the NT631/NT631C power ON.
The screen data is automatically written into the PT.
The messages Preparing, Transmitting, Verifying and Finished are dis-
played on the screen in accordance with the progress of data writing.
At the same time, the progress of data writing status is displayed by the
means of the number of bytes and blocks (1 bank = 16 block = 1024k byte).
The RUN LED operates as follows according to the processing status.
Preparing: flashes at intervals of 1 second
Transmitting: flashes at intervals of 0.5 second
Verifying: flashes at intervals of 0.5 second
Finished: lights up
3. Switch the NT631/NT631C power OFF, remove the Memory Unit.
To operate NT631/NT631C continuously, switch the NT631/NT631C pow-
er back ON.
Reading and Writing Data
by Manual Transmission
In this method, the direction of transmission and area of the Memory Unit
used are set by touch switch operations at the NT631/NT631C. Transmission
can be executed while checking the settings.
SW1
SW2-4 ON: System/Screen transmitted simultaneously
OFF: System/Screen not transmitted simultaneousl
y
SW2
SW1-4 ON: System program
OFF: Screen data
SW2-3 ON: Bank 1
OFF: Bank 0