Omron DeviceNet Memory allocation

History:

On an Omron CJ1W-DRM21 Network, had a servo driven actuator that went bust. This node is in the middle of the memory map (node 6), with 2 input and 2 output bytes. The replacement for this obsolete unit has 3 input / 3 output bytes. Quickie overview of the allocation table attached.

Questions:

• Just changing the allocation of node 6 will bump all the addresses of the nodes after it, correct?

• If I move the new unit to node say, node 10, will the allocation for node 6 stay in place if I take it out of the scan list?

Thanks in advance for your advice!

I knew I was taking a long shot with the late posting, and having to be back in at 2am to finish this up, but no replies? At all? Really?!?

There. It's not often I get to get my digs in, so I'll jump on it when the opportunity arises. The beauty of it is that I get to hit everyone at once. That's value for the money, right there! :evil laugh:

In the interest of completeness, I'll answer my own questions...

JordanCClark said:

• Just changing the allocation of node 6 will bump all the addresses of the nodes after it, correct?

Click to expand...

Yes. Yes, it will.

JordanCClark said:

• If I move the new unit to node say, node 10, will the allocation for node 6 stay in place if I take it out of the scan list?

Click to expand...

No. No, it won't

So for now, I'll live with the error of the now-missing node 6 until I find/buy/make a dummy placeholder.

You don't have to rely on the automatic mapping. Use CxIntegrator and map the damn data where you want.
Pp