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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
0432
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