1-4
Section
Communication Using the Direct Connection Function
12
1-4-2 NT Link
The NT link is a new communication method applied between the NT620S/620C
and a PC.
The PCs that can be connected using the NT link are as follows.
S
When using the built-in host link of the CPU unit
CPM1 (RS-232C adapter required), CQM1, C200HS, C200HX/HG/HE,
CVM1/CV series PCs.
S
When using a communication board
C200HX/HG/HE
When using the NT620S/NT620C in an NT link, two communications modes are
possible: a single NT620S/NT620C can be connected to one PC (1:1 NT link), or
alternatively, up to eight NT620S/NT620C units can be connected to a single PC
port (1:N NT link).
However, the 1:N connection NT link can be used with C200HX/HG/HE only. In
the following sections, the NT link communication mode in general will be indi-
cated by the term “NT link”, a 1:1 connection NT link will be indicated by “NT link
(1:1)”, and a 1:N connection NT link will be indicated by “NT link (1:N)”.
Features of the NT Link
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 another bit of a word data to which a touch switch has been allo-
cated to be used for other purpose (e.g., to allocate a lamp).
S
This can be used even when the PC is in the RUN mode.
When using the host link, the operation mode changes to the monitor mode.
S
Provided the PT used is one that supports the NT link (1:N) (i.e., NT30/NT30C/
NT20S/NT600S/NT620S/NT620C), up to eight PTs can be connected to a
single PC port.
S
When using C200HX/HG/HE, by installing an expansion communication
board in the option slot of the CPU unit, it is possible to connect up to three NT
link (1:N) systems (comprising a total of 24 NT620S/NT620C units). For de-
tails on communication boards, refer to the “SYSMAC C200HW-COM01 to
06-E Communication Board OPERATION MANUAL” (W304-E1-
j
).
(*) Except a DM area.
The NT link function is compatible with the host link function with respect to
screen data. The NT620S/620C screen data and the PC programs handled by
the host link direct connection can be used with for the NT link as they are.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
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