Omron NT20M Operation Manual page 13

Models
1-4-2 NT2000M Programmable Terminals
Memory Chips
Memory Capacity and
Number of Screens
Host Interface Units and
Conforming System ROM
The NT2000M-DT, touch-panel type and the NT2000M-DN131, non-touch-
panel type models employ a two-color backlight (changeable between white
and red), which is replaceable and is sold separately. The NT2000M-DN131,
like the NT20M models described above, does not come with an image data
memory chip mounted. This must be purchased separately.
System ROM is also sold separately. Select the System ROM according to
the Host Interface Unit that is mounted to the PT, as described in Host Inter-
face Units and Conforming System ROM below.
In order for images to be saved, screen data memory is required. The follow-
ing memory chips can be purchased separately and mounted in the socket.
Type Memory
capacity
SRAM 32K bytes
128K bytes
EPROM* 64K bytes
128K bytes
EEPROM 32K bytes
Notes 1. When using EPROM, use a PROM writer to write the data that was
created by the Support Tool, and then mount the chip in the PT.
2. If memory chips other than the recommended ones are used, the memory
backup battery capacity may not be sufficient.
Screen memory capacity varies according to which Screen Data Memory
Board is installed. The screen memory capacity, in turn, determines the num-
ber of screens that can be registered. Use the table below as a guide to se-
lect the amount of memory suitable for your needs.
Screen memory capacity
32K bytes
64K bytes
128K bytes
Note The table above is strictly a guide. If the messages or other display data per
screen increase, the number of screens that can be registered will decrease.
Likewise, if the messages decrease, the number of screens (250 screens
max.) that can be registered will increase.
Host Interface Units provide the interface for communications between the
PT and the host, which may be either a C-series Programmable Controller or
an FA computer. The System ROM is ROM which contains the programs
necessary for operating the PT. Select the System ROM according to the
Host Interface Unit that is to be mounted to the PT. System ROM is used in
common for both NT20M and NT2000M PTs.
Host Interface Unit
NT600M-LK201 (RS232C/SYSMAC WAY)
NT600M-LK202 ((RS-422)
NT600M-RT121 (SYSMAC BUS)
NT600M-LB121 (C200H Host Interface)
NT600M-LK201 (Host Link direct connection)
Model Recommended memory chips
RAM22-15 HM62256ALP-15 (Hitachi).
RAM13-10 HM628128LP-10 (Hitachi).
ROM-KD-B M5M27C512AK-12 (Mitsubishi)
ROM13-12B HN27C101AG-12 (Hitachi).
EER22-20 HN58C256P-20 (Hitachi).
Number of registered screens
Mostly messages: 140 screens
Mostly graphics:
Mostly messages: 250 screens
Mostly graphics:
Mostly messages: 250 screens
Mostly graphics:
NT20M-SMR01-E
NT20M-SMR02-E
NT20M-SMR31-E
Section 1-4
50 screens
100 screens
200 screens
System ROM
5