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Overview of Direct Connection Operations
Section 5-1
The PT status control area (PC to PT) can be allocated to the following PC
areas.
Symbol
C Series PCs
Allocated
CVM1/CV Series PCs
Allocated
DM
Data Memory
f
Data Memory
f
CH
Internal/Special Relay
f
Internal/Special Relay
f
TIM
Timer
Timer
CNT
Counter
Counter
HR
Holding Relay
f
–
AR
Auxiliary Relay
f
Auxiliary Relay
LR
Link Relay
f
–
f
: OK
: NG
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.
Correct Use:
Make sure there is no duplication in the PT status control area allocations and PT
status notify area allocations.
Reference: When NT link (1:N) is set, the PT status control area must be set for each con-
nected PT.
Notifying the Display Elements by Using Allocated Bits and Words
The NT20S will operate as follows in the display element notification operation.
[NT20S operation]
The NT20S will write any changes in the contents of the numeral or character-
string memory table being displayed or pressing of a touch switch to the bits and
words area in the PC.
[NT20S operation example]
Touch switch #12
Bit009012
Numeral memory table 100
Copy
Bit 009012:ON
Numeral memory table0
Number of saved words
: 1
First word
: DM0110
DM0110:0432
NT20S
PC
0
4
3
2
Summary of Contents for NT20S
Page 1: ...Cat No V020 E1 04 NT20S Programmable Terminal OPERATION MANUAL ...
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Page 4: ...iii NT series Programmable Terminal Operation Manual Revised August 1997 ...
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