1-2 Communications with the Host
1-6
1-2-1 What is an NT Link?
An NT Link is a method for high-speed communications with OMRON PLCs using a special
protocol. The following PLCs can be connected using NT Link communications.
CPM1A, CPM2A, CPM2C, CQM1, CQM1H, C200HS, C200HX/HG/HE (-Z),
CS1G/CS1H-E (V1), CS1G/CS1H-H, CJ1G, CJ1G/CJ1H-H, and CVM1/CV-series (V1 and
higher) PLCs
In addition to 1:1 NT Links, where a single PT is connected to a single PLC, NS-series PTs
also support 1:N NT Links, allowing up to eight PTs to be connected to a single PLC port.
The following PLCs can be connected using 1:N NT Link communications.
CQM1H, C200HX/HG/HE(-Z), CS1G/CS1H-E(V1), CS1G/CS1H-H, and CJ-series PLCs
The NS-series PTs also support high-speed 1:N NT Links for even faster communications.
The following PLCs can be connected using high-speed 1:N NT Link communications.
CS1G/CS1H-E (V1 and higher), CS1G/CS1H-H, and CJ-series PLCs
In the rest of this manual, "NT Link" refers to NT Link communications in general, "1:1 NT
Link" refers to an NT Link in a 1:1 configuration only, and "1:N NT Link" refers to NT Links in
a 1:N configuration only. Where necessary, normal 1:N NT Link and high-speed 1:N NT Link
are used. When "1:N NT Link" is used alone, it refers to both normal and high-speed com-
munications.
1-2-2 Ethernet
The NS-series PTs can communicate with hosts that are connected to the Ethernet and
support FINS message communications, one of OMRON’s standard communications serv-
ices. Ethernet Units for PLCs that are supported by the NS-series PTs can be used to read
and write data, word, and bit information quickly and simply without requiring protocol recog-
nition. The following PLCs can be connected to the Ethernet.
CS1G/CS1H (V1), CS1G/CS1H-H, CVM1/CV, and CJ-series PLCs
1-2-3 Controller Link
The Controller Link is an FA network that can send and receive large data packets flexibly
and easily among OMRON PLCs and IBM PC/AT or compatible computers. The Controller
Link supports data links that enable data sharing and a message service that enables send-
ing and receiving data when required.
The following PLCs can be connected using Controller Link: CS1G/CS1H-E(V1),
CS1G/CS1G-H, C200HX/HG/HE(-Z), CV500/CV1000/CV2000(V1), CVM1(V2), CQM1H,
CJ1G, and CJ1G/CJ1H-H.
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