Default and fixed port usage in NX/NJ
Written by Arlo D'Cruz
Updated at April 19th, 2023
TCP/ UDP Port Numbers Used for the Built-in EtherNet/IP Port
The following table shows TCP/UDP port numbers used by the built-in EtherNet/IP port, whether or not it is reserved by the system, whether or not the port number can be changed by the user, protocol used, default state, usage, and how to close the port from the default open state, for each application.
TCP/UDP ports (servers) other than those shown below are not used. For more information please see the CPU Unit Built-in Ethernet/IP Port user manual (W506).
| Application | CPU Unit Model | UDP port | TCP Port | System Reserved | Port Number Change | Protocol used | Default | Usage | How to close the port from open state |
| FTP Server | All models | --- | 20 | Reserved | Not Possible | FTP | Closed | Used when using the FTP server | --- |
| --- | 21 | --- | Not Possible | Closed | --- | ||||
| SSH/SFTP | All models | --- | 22 | Reserved | Not Possible | SSH/SFTP | Closed | For maintenance | --- |
| DNS client | All models | 53 | --- | Reserved | Not Possible | DNS | Closed | Used when using the DNS client | --- |
| BOOTP client | All models | 68 | --- | Reserved | Not Possible | BOOTP | Closed | Used when using the BOOTP client | --- |
| HTTP server | All models | 80 | --- | Reserved | Not Possible |
HTTP | Closed(Post v1.50) | Used for communications with Sysmac Studio pre v1.50 or when DIP switches set |
--- |
| NTP client | All models | 123 | --- | --- | Possible | NTP | Closed | Used when using the NTP client. | --- |
| Application | CPU Unit Model | UDP port | TCP Port | System Reserved | Port Number Change | Protocol used | Default | Usage | How to close the port from open state |
| SNMP | All models | 161 | --- | --- | Possible | SNMP (SNMPv1, SNMPv2C | Closed | Used when using the SNMP agent | --- |
| SNMP trap | All models | 162 | --- | --- | Possible | Closed | Used when using the SNMP trap | --- | |
| HTPPS server | All models | --- | 443 | Reserved | Not Possible | HTTPS | Open | Used for communications with Sysmac Studio post 1.50 |
Make one of the following settings. Use the Packet Filter. *1 Set the DIP switch to Enable connections to the Sysmac Studio and NA that are not supporting secure communication. |
| Ethernet/IP tag data links |
All models |
2222 |
--- |
Reserved |
Not Possible |
CIP |
Open |
Used for Ethernet/IP tag data links |
Set Built-in EtherNet/IP Port Settings - CIP Settings - CIP Message Server to Do not use on Sysmac Studio. |
| All NJ series models |
2223 |
--- |
Reserved |
Not Possible |
Open |
||||
| Application |
CPU Unit Model |
UDP Port |
TCP Port |
System Reserved |
Port Number Change |
Protocol used |
Default |
Usage |
How to close the port from the open state |
| FINS/UDP |
All NJ-series models All NX1P2 NX102*2 NX701-1▢20*2 |
9600 |
--- |
--- |
Possible |
FINS (Omron protocol) |
Open |
Used for FINS/UDP |
Set Built-in EtherNet/IP Port Settings - FINS Settings - FINS/UDP to Do not use on the Sysmac Studio. |
| FINS/TCP |
All NJ-series models All NX102*2 NX701-1▢20*2 |
--- |
9600 |
--- |
Possible |
Open |
Used for FINS TCP |
Set Built-in EtherNet/IP Port Settings - FINS Settings - FINS/UDP to Do not use on the Sysmac Studio. |
|
| Sysmac Studio |
All models |
9600 |
--- |
Reserved |
Not Possible |
Open |
Used for communication with Sysmac Studio |
Use the Packet Filter *1 |
|
| CPU Units that support USB Port All NJ-series models All NX701*3 |
2224 |
--- |
Reserved |
Not Possible |
Closed*4 |
--- |
|||
| Application |
CPU Unit Model |
UDP Port |
TCP Port |
System Reserved |
Port Number Change |
Protocol used |
Default |
Usage |
How to close the port from the open state |
| Maintenance |
All models |
--- |
9610 |
Reserved |
Not Possible |
TCP (Omron protocol) |
Closed |
For maintenance |
--- |
| CIP messages |
All models |
44818 |
44818 |
Reserved |
Not Possible |
CIP |
Open |
Used for CIP messages |
Set Built-in EtherNet/IP Port Settings - CIP Settings - CIP Message Server to Do not use on Sysmac Studio. |
| OPC UA |
CPU Units that support OPC UA NJ501-1▢00 NX102-▢▢▢▢*5 NX701-1▢▢▢*5 |
--- |
4840 |
--- |
Possible |
OPC UA |
Closed |
Used for OPC UA |
--- |
| TCP/UDP message service |
CPU Units that support TCP/UDP message service NX102-▢▢▢▢ |
64000 |
64000 |
--- |
Possible |
TCP/UDP |
Closed |
Used when using the TCP/UDP message service |
--- |
| Application |
CPU Unit model |
UDP port |
TCP port |
System reserved |
Port number change |
Protocol used |
Default |
Usage |
How to close the port from the open state |
| SECS/GEM connection service |
CPU Units that support SECS/ GEM NJ501-1340 |
--- |
9700 |
Reserved |
Not Possible |
TCP.UDP (Omron Protocol) |
Open |
Used when using the SECS/GEM connection service. | Use the Packet Filter |
| --- |
5000 |
--- |
Possible |
SECS-II |
Closed |
--- |
|||
| DB connection service |
CPU Units that support DB connection NJ501-XX20 NJ101-▢▢20 NX102-▢▢20 NX701-1▢20 |
--- |
9800 |
Reserved |
Not Possible |
TCP (Omron Protocol) |
Open |
Used when using the DB connection service. |
Use the Packet Filter |
| --- |
9801 |
Open |
|||||||
| --- |
9810 |
Open |
|||||||
| --- |
9811 |
Open |
|||||||
| Application |
CPU Unit model |
UDP port |
TCP port |
System reserved |
Port number change |
Protocol used |
Default |
Usage |
How to close the port from an open state |
| Robot Integration |
CPU Units that support Robot Integrated Controller NJ501-R▢▢▢ |
1989 |
--- |
Reserved |
Not Possible |
UDP (Omron Protocol) |
Open |
Used for communications with ACE (including Application Manager) or Sysmac Studio. |
Use the Packet Filter. To close the ports on the left at once, remove the SD Memory Card, execute clear all memory operation, then restart the Controller. |
| 1992 |
--- |
Open |
|||||||
| 1997 |
1997 |
TCP/UDP (Omron Protocol) |
Open |
||||||
| Open | |||||||||
| 65533 |
--- |
UDP (Omron Protocol) |
Open |
||||||
| 65534 |
--- |
Open |
|||||||
| 1990 |
--- |
Closed |
|||||||
| 1993 |
--- |
Closed |
|||||||
| 69 |
--- |
TFTP |
Closed |
||||||
| --- |
43234 |
TCP (Omron Protocol) |
Closed |
||||||
| --- |
48987 |
Closed |
*1. Closing the port may prevent communications with the Sysmac Studio. Refer to Troubleshooting When You Cannot Go Online from the Sysmac Studio in the NJ/NX-series Troubleshooting Manual (Cat. No. W503) on how to make corrections.
*2. This port number is supported only on Port 2. It cannot be used on Port 1.
*3. Only if the CPU unit has USB port.
*4. Always closed for the built-in EtherNet/IP port. Opened for the USB port only.
*5. This port number is supported only on Port 1. It cannot be used on Port 2.
Warning
When using socket service instructions, specify the port number so that the port numbers used do not overlap. If the port numbers used are duplicated, an error will occur during instruction execution.