Using A Memory Unit - Omron NT20S-ST121B-EV3 User Manual

Using a Memory Unit

2-5

Using a Memory Unit

Note
36
This section explains how to use a Memory Unit with the NT20. By installing a
Memory Unit (NT-MF261) on the NT20, the system program or the screen
data in the NT20 can be recorded (backed up) in the Memory Unit.
In addition, the system program or the screen data in the Memory Unit can be
automatically read into the NT20 when it starts up. This means that system
program and screen data can be changed easily at the operation site without
connecting to the NT 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 according to the
control performed in each case, the NT20 screen data can be changed simply
by installing the Memory Unit, without connecting to the NT Support Tool.
Even if NT20 is replaced, the previous status can be maintained simply by
installing the Memory Unit that retains the system program and screen data of
the previous NT20.
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.
(1) Make sure that the power supply to the PT is OFF before connecting or
disconnecting a Memory Unit. After mounting a Memory Unit, be sure to
tighten its two screws. Otherwise the product may malfunction.
(2) During data transmission, do not turn OFF the power supply to the NT20.
(3) Do not touch the PCB (printed circuit board) with bare hands. Also, dis-
charge any static electricity by touching a grounded object before con-
necting or disconnecting a Memory Unit. Static electricity may cause the
components to malfunction.
(4) Be sure that the combination of the system program and screen data is
correct in the NT20 before transferring data from the Memory Unit to the
NT20. If the system program and screen data are not combined correctly,
unexpected operation may result.
Reference:
• When a Memory Unit is mounted, the NT20 cannot be set to the operating
status. On completion of data transmission with a Memory Unit, always
disconnect the Memory Unit from the NT20 before starting NT20 opera-
tion.
• One Memory Unit can store a system program for up to two PTs of differ-
ent models. In order to transmit a system program from the Memory Unit
to the NT20, the system program must be compatible to the target PT
model.
• The status of memory switch settings can be recorded to the Memory Unit
besides screen data. When the data in the Memory Unit is written into the
NT20, make sure that these settings can be adapted to the NT20 used
before transmission.
Section 2-5