No of nodes can be used on CJ1W-EIP21

[Chavak 2]

Hi,

How many does does CJ1W-EIP21 support in Ethernet IP connection.

A bit confused when reading the spec from the manual. It says -

No of connections - 256

Class 3 (connected) - No of connections - 128

UCMM (unconnected)  - Number of clients that can communicate at one time: 32 max.
Number of servers that can communicate at one time: 32 max.

I have more then around 40 nodes to be connected thru this module to a CJ2M PLC. What are my options?

Thank you

[chelton 66]

How are the devices going to be connected? Implicit connection (class 1) or explicit (class 3).

If using class 1 256 tag sets are available, each device may require 2 tag sets one input and one output, so 128 devices would be possible.

If you have input only connections more devices would be possible.

40 nodes should be no problem on the cj1w-eip21, however you would not have enough connections using the build in ethernet/ip port on the cj2m.

[Chavak 2]

Thank you Chelton for the clarification.

I'm using implicit connection. My nodes uses both input and outputs. They are mainly 14 servo drives, 17 SMC valve banks, 4 cognex vision camera and 4 remote IO modules. I also plan to have a data link connection with another CJ2 PLC for some data sharing. [ The other PLC had more or less similar node count on its own network].

When having a data link connection, will that combine the node count on a single module?