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Reference
Note
96
Outline of Host Link / NT Link Operation
Section 5-1
5-1
Outline of Host Link / NT Link Operation
This section describes the basics for operating the NT11S through communica-
tions with the PC using the host link/NT link.
5-1-1
Equipment and Settings Used in This Chapter
The following equipment and settings are used in the examples in this Chapter:
[Equipment] PT
: NT11S-ST121
PC
: CQM1
Support tool : NT11S Support Tool
5-1-2
Allocatable Bits and Words
The following bits and words are allocated to the PC and used for the NT11S op-
eration. The range of respective area varies with the type of PC. Refer to Appendix
H PC Memory Map (page 160).
The allocations must be made without exceeding respective area range.
[OMRON PCs]
Symbol
Area Name
Allocated Bit
Allocated Word
Symbol
Area Name
Allocated Bit
Numeral
Character
String
DM
Data Memory
f
f
f
CH
Internal/Special Relay
f
f
f
TIM
Timer
×
×
CNT
Counter
×
×
HR
Holding Relay
f
f
f
AR
Auxiliary Relay
f
f
f
LR
Link Relay
f
f
f
f
: 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 10 words in the case of character-
string memory table.
When allocating a memory table to words, the allocation must not exceed the
word area.
5-1-3
Data Exchange in the Host Link/NT Link
There are two main methods for data exchange when using the host link/NT link,
as follows:
S
Using the PT status control area/PT status notify area
S
Allocating numeral memory tables/character string memory tables
Using the PT status control area/PT status notify area
Contiguous areas (4 words for the PT status control area and 3 words for the PT
status notify area) must be allocated in the PLC memory in advance.
Screen switching, memory table copy and PT status change operations, etc, are
possible by using the PT status control area and PT status notify area.
Summary of Contents for NT11S
Page 1: ...Cat No V029 E1 2 NT11S Programmable Terminal OPERATION MANUAL ...
Page 3: ...i ...
Page 4: ...ii ...
Page 5: ...iii NT series Programmable Terminal Operation Manual Produced June 1997 ...
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Page 32: ...16 ...
Page 56: ...40 ...
Page 86: ...70 ...
Page 146: ...130 ...