Omron Programmable Terminals NT31 NT31C - Manual (Page 50)

3-5 Section Using a Memory Unit (-Vj Versions)
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3-5 Using a Memory Unit (-V
j Versions)
This section discusses the use of a memory unit with a V1 or V2 version of an
NT31/NT31C PT (NT31-ST121
j-EVj or NT31C-ST141j-EVj).
Reference: Depending on the PT model and the system program which is installed, the func-
tion and using method of memory unit varies as follows.
PT Model System Program Function of Memory Unit
Without V
j
Earlier than Ver. 2
Conventional memory unit function. (Refer to
56.)
Without V
j
suffix
Ver. 2 or later
56.)
(System programs can not be transmitted us-
ing memory unit.)
With V
j suf-
Earlier than Ver. 2 New memory unit function.
(System programs can be transmitted using
With V
j suf
fix
Ver. 2 or later
(System programs can be transmitted using
memory unit.)
The memory unit functions are determined by the model of PT being used, re-
gardless of the version of the system program installed in the PT.
By installing a memory unit (NT-MF261) on the NT31/NT31C, the screen data in
the NT31/NT31C can be recorded (backed up) in the memory unit.
In addition, the screen data in the memory unit can be automatically read into the
NT31/NT31C when it starts up. This means that system program and screen
data can be changed easily at the operation site without connecting to the Sup-
port 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 NT31/NT31C screen data can be
changed simply by installing the memory unit, without connecting to the Support
Tool.
In addition, even if NT31/NT31C is replaced, the previous status can be main-
tained simply by installing the memory unit that retains the system program and
screen data of the previous NT31/NT31C.
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
NT31/NT31C or reset it.
3. Do not touch the PCB (printed circuit board) with bare hands.