The Type Of Host And Settings - Omron NT31 Setup Manual

Connecting to the Host's RS-232C Port
PLC (At termination)
NT31C
(Not at
(Not at
termination) (Not at
termination)
Example of Good Connection
Reference: CS-series CPUs cannot be connected with the 1:1 connection NT link method.

5-1-1 The Type of Host and Settings

Note One end of the wire must always be connected to the host (PLC), and there must
be no branching. Branching will cause problems such as transmission delays
and communication failures.
Relay terminal block
Max. 2 m
NT31 NT31 NT31
NT31
(At
termination)
termination)
Use the 1:N connection NT Link method (standard or high-speed) instead to
make the 1:1 connection. For details, refer to Using the NT link (1:N) method
(page 70) or Using the High-speed NT link (1:N) method (page 73).
The using condition is the same as the connecting PT side RS-232C and the
host side RS-232C.
For the available type and settings of the host, refer to the pages listed below.
Method
Host link
NT link (1:1)
NT link (1:N)
High-speed NT link (1:N) Using the High-speed NT Link (1:N) Method (page 73)
Memory link
PLC
NT31C NT31 NT31 NT31C
Examples of Bad Connections
Reference
Host Link Method (page 52)
NT Link (1:1) method (page 65)
Using the NT Link (1:N) Method (page 70)
Memory Link Method (page 76)
Section
PLC
Relay terminal block
NT31
5-1
85