17
Communication with the Host
Section 1-3
Features of the NT Link
The NT link has the following features.
S High-speed communications with specific types of PCs can be executed.
S Writing in units of bits to the PC memory area is possible.
This enables the other bits of words to which a touch switch has been allocated
to be allocated for other purposes (e.g. a lamp).
However, since data is written to the DM area in word units, the other bits of
words allocated to touch switches in this area cannot be used for other pur-
poses.
S The NT link can be used even when the PC is in the RUN mode. (When the host
link method is used, the NT31/NT31C switches to the monitor mode when the
PC is in the RUN mode.)
S In the case of PTs that support the host link (1:N) method (NT20S, NT31,
NT31C, NT600S, NT620S, NT620C, NT625C, NT631, NT631C) up to 8 PTs
can be connected to one port of the PC and used at the same time.
S When using C200HX/HG/HE-(Z)E, by installing a communication board in the
option slot of the CPU, up to three NT link (1:N) systems (i.e., 24 PTs) can be
connected. For details on the communication board, refer to the SYSMAC
Communication Board User’s Manual (W304-E1-j).
S When using CS1G/H, by installing a communication board in the INNER board
slot of the CPU or installing a serial communication unit in the base unit, multiple
NT link (1:N) systems can be connected. For details on the communication
board/communication unit, refer to the CS1 series Serial Communication Board/
Unit User’s manual (W336--E1--j).
S If the PC used supports the programmable console function, the NT31/NT31C
can be used as a programmable console.
The NT link is compatible with the host link. The NT31/NT31C screen data andPC
programs used with the host link direct connection method can be used with the
NT link method as they are.
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