Target Status for nodes greater that 64 on CJ1W-EIP21
Written by Arlo D'Cruz
Updated at October 22nd, 2025
The CJ1W-EIP21(S) allows you to monitor the target status of nodes 0 to 63. On a CJ series PLC this will be at n = CIO 1500 + (25 x unit number) + 16.
On the NJ series this will be part of the I/O map.
Although the default device variable/CIO area for CJ-series Unit provides information only for nodes 0 to 63, you can obtain the information for 256 nodes if you activate the user settings area.The process for doing so is found below.
NJ Series
- Double-click CPU/Expansion Racks under Configuration and Setup in the Sysmac Studio, right-click the EtherNet/IP Unit, and select Register Data Types for Units from the menu. This operation makes the data type _sCJEIP21_User_StaArea available.
- In the Multiview Explorer of the Sysmac Studio, select Programming – Data – Global
Variables.
- In the global variables table, set a user-defined variable with a Name (any name), Data Type (_sCJEIP21_User_StaArea), and Network Publish (Publish Only or Output).
- Double-click Special Unit Setup under Configurations and Setup in the Sysmac Studio and, in the Status Area Settings Display, set the Layout type to User setting.
- Specify the variable set in step 3 in Mapped area.
The nodes 64-255 should now be accessible in the newly created variable as shown below.
CJ Series
- Open the IO Table and double click on the CJ1W-EIP21 to open the Edit Parameters window.
- Swap to the Status Area tab.
- From the dropdown, select User Defined and then define the address you wish to allocate the User settings area to.
Note that the User Setting area has the below structure:
The registered target node is structured as below.
Example
If we assigned the user area to D1000, and wanted to access the status of target node 100, this would be located at D1022.04.