Experimental Physics and
Industrial Control System

Paul Hamadyk <[email protected]> · Thu, 17 Dec 2009 14:29:43 +0000

On Thu, 2009-12-17 at 09:07 -0500, Wesley Moore wrote:

> I'm using the CJ1's as well paired with the ETN21 Ethernet module.  I 
> believe one I'm using has the built in Ethernet but it's basically the 
> same.  The Ethernet driver uses the FINS protocol.  I can read/write 
> bits or words to the PLC.  The memory areas I read/write to are DM, CIO, 
> WR, and HR.  I've found pretty quick that reading by word and splitting 
> out the bits to individual bi and bo's was the way to go.  Much faster 
> that way.  I've got the driver working in EPICS 3.13 and 3.14.
> 
> 
> Wesley

I will be making a streams protocol file for FINS/UDP, using asyn's
UDP/IP for the request and UDP/IP Server for the reply, if you're
interested? Can you think of any advantages in using your Ethernet
driver?

We tend to use Data Memory (DM) with a bit of Core IO (CIO) and
Auxiliary Registers (AR) for PLC status and error information.

Paul.

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System