Omron Programmable Terminals NT631C - Manual (Page 56)

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Using a Memory Unit Section 3-5
3-5 Using a Memory Unit
This section discusses the use of the Memory Unit.
Reference: The Memory Unit functions are determined by the model of PT being used,
regardless of the version of the system program installed in the PT.
By installing a Memory Unit (NT-MF261) on the NT631/NT631C, the screen
data in the NT631/NT631C can be recorded (backed up) in the Memory Unit.
In addition, the screen data in the Memory Unit can be automatically read into
the NT631/NT631C when it starts up. This means that system program and
screen data can be changed easily at the operation site without connecting to
the Support Tool.
The data in the Memory Unit is retained without backup by a battery or other
means.
In systems where there are frequent setup changes, by preparing a number of
Memory Units in advance and recording screen data in them in accordance
with the control performed in each case, the NT631/NT631C screen data can
be changed simply by installing the Memory Unit, without connecting to the
Support Tool.
In addition, even if NT631/NT631C is replaced, the previous status can be
maintained simply by installing the Memory Unit that retains the system pro-
gram and screen data of the previous NT631/NT631C.
By using the following combinations, data can be stored (backed up) to a
Memory Unit.
• Screen data for two PTs.
• System program for two PTs.
• System program and screen data for one PT.
One Memory Unit can store the screen data for two PTs.
Note 1. Make sure that the power supply to the PT is OFF before connecting or dis-
connecting a Memory Unit.
After mounting a Memory Unit, be sure to tighten its two screws.
2. During data transmission, do not turn off the power supply to the NT631/
NT631C or reset it.
3. Do not touch the PCB (printed circuit board) with bare hands.
Reference: • When a Memory Unit is mounted, the NT631/NT631C cannot be set to
the operating status. On completion of data transmission with a Memory
Unit, always disconnect the Memory Unit from the NT631/NT631C before
starting NT631/NT631C operation.
• Memory Units (NT-MF261) can be used in common for the following PT
models: NT31, NT31C, NT631, and NT631C. One Memory Unit can store
screen data for up to two PTs of different models. However, since the data
compatibility is not complete between NT31/NT31C and NT631/NT631C,
an error may occur if an attempt is made to read NT631C data with an
NT31C. (The data must be converted using the Support Tool.)
Note also that although there is data compatibility between the NT31
and NT31C, and between the NT631 and NT631C, the display may not
be correct since these models have different numbers of colors.
PT Model Function of Memory Unit
Without V @ suffix System programs can not be transmitted using Memory Unit.
With V @ suffix System programs can be transmitted using Memory Unit.