Omron NT-series Programmable Terminal V022-E3-1 Manuale Utente Pagina 29

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Caution
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Section 1-4
2-4-2 C200H Direct Communication
C200H direct communication allows communication with C H, C200H, and
C200HS CPU units by using the “direct connection” function.
Advantage of C200H Direct Communication
Since an I/O connecting cable is used for connection to each CPU unit, high-
speed communication is possible.
Data can be written to the PC memory area in bit units, This means that the un-
used bits of words allocated to touch switches can be used for other applications
(for example, lamp allocations.)
The C200H direct communication function is compatible with the host link and NT
link functions. This means that NT600S screen data and PC programs handled
with the host link and NT link functions can also be used with the C200H direct
communication function as they are.
In a system where the user program operates according to the PC cycle time, the
system operation may not be constant because of cycle time fluctuations.
Consider this point when designing the system.
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