Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 168)

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Section 5-1
6-1 Outline of Host Link / NT Link / C200H Direct Operation
This section describes the basics for operating the NT600S through communica-
tions with the PC using the Host link/NT link/C200H direct.
6-1-1 Equipment and Settings Used in This Chapter
The following equipment and settings are used in the examples in this Chapter:
[Equipment] PT : NT600S-ST121-EV3
PC : CQM1
Support tool : NT-series Support Tool Ver. 2.


[Support tool settings]
NT Model : NT600S
Memory capacity : 128 KB
Direct Access : Ver.5
Direct Macn Type : OMRON
6-1-2 Allocatable Bits and Words
The following bits and words are allocated to the PC and used for the NT600S op-
eration. The range of respective area varies with the type of PC. Refer to Appendix
L PC Memory Map (page 291).
The allocations must be made without exceeding respective area range.
[OMRON PCs]
C Series PCs CVM1/CV Series PCs
Symbol
Allocated
Allocated Word
Allocated
Allocated Word
Symbol
Area Name
Allocated
Bit Numeral
Character
String
Area Name
Allocated
Bit Numeral
Character
String
DM Data Memory ✓ ✓ ✓ Data Memory ✓ ✓ ✓
CH
Internal/Special
Relay
✓ ✓ ✓
Internal/Special
Relay
✓ ✓ ✓
TIM Timer

Timer


CNT Counter



Counter



HR Holding Relay ✓ ✓ ✓ --
AR Auxiliary Relay ✓ ✓ ✓ Auxiliary Relay ✓ ✓

LR Link Relay ✓ ✓ ✓ --
✓ : OK : 1 word only
: NG
One allocation word of the memory table can use continuous areas of up to 2
words in the case of numeral memory table or 20 words in the case of character-
string memory table.
When allocating a memory table to words, the allocation must not exceed the
word area.
Since the special auxiliary relays of the CV series PCs are allocated to the system,
they cannot be used for purposes other than the system use. However, reading
from them is possible.