Section 2 NS Series Functions 2-4 System Memory
2-42
NS Series Programming Manual
Symbol C-series PLCs Allocation
CVM1/CV-series
PLCs
Allocation CS/CJ-series PLCs Allocation
W
Work Area
{
TK
Task Flags
×
D DM Area
{
DM Area
{
DM Area
{
E
EM Area (See note
2.)
(Current bank)
{
EM Area
(Current bank)
{
EM Area
(Current bank)
{
E0_
EM Area
Bank 0
{
E18_
EM Area
Bank 18
{
Note 1. LR 00000 to LR 00199 are converted to and used as I/O area words CIO 01000 to CIO 01199.
2. C200HX/HG/HE-E/-ZE PLCs are the only C-series PLCs that support the EM Area (EM).
All bits in the CVM1/CV-series Auxiliary Area are allocated for system functions and cannot be used for
any other application.
Set an array variable with 41 elements when allocating a tag. The data type must be UINT, INT,
UINT_BCD, CHANNEL, or WORD.
The ranges for each area vary with the PLC model. Refer to Appendix 3 PLC Memory Areas.
Refer to System Settings and Project Properties in the CX-Designer Online Help for details on alloca-
tion methods.
2-4-3 System Memory Compatibility with the NT Series
The method for allocating system memory in the PLC areas can be changed to the same method as
for the NT30/620 and NT31/631 Series.
System memory in the NS Series can be allocated in the PLC areas as a PT status control area, PT
status notification area, and Window control area, the same as the NT Series system memory.
This makes it easy to use PLC ladder programs as is when converting from the NT Series to the NS
Series.
N
N
N
o
o
o
t
t
t
e
e
e
♦
PLC area operations for functions that are unique to the NT Series will not operate in
the NS Series.
♦
System memory that contains functions unique to the NS Series cannot be allocated
to the PLC areas. Set $SB and $SW directly, e.g., by using a functional object or
other object, when using system memory for these unique functions.
♦
This function will not work when connected to a PLC that is not manufactured by
OMRON.
♦
Only numerical values in BCD format can be stored in the PLC areas if compatibility
with the NT Series is enabled.
♦
Compatibility with NT-series PTs will be lost if tags are set as allocation addresses.
NT30/620 Series
The PT status control area allocations are listed in the following table.
Word Function Corresponding system memory
n Screen number (control only)
(See note.)
$SW0 (currently displayed screen
number)
n+1 Not used
−
n+2 Not used
−
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