Gary Carr wrote:
> Has anyone done device support for devices accessed directly through
> ethernet? Socket interface I would assume.
>
> Our magnet team is looking at designing a magnet power supply controller
> with a direct ethernet interface, rather than the serial interfaces we have
> mostly used in the past.
We have done two things here:
a) wrote device/driver support for Modicon PLCs using TCP/IP and interfacing
to the NOE 211 Ethernet module. This package supports ao, ai, bo, bi, mbbo,
mbbi, mbboDirect, and mbbiDirect records. TCP/IP transactions (Polling the PLC)
are done by spawned tasks which interface to EPICS through memory buffers.
b) interface via TCP/IP and UDP to RF controllers which are developed and
maintained by the TRIUMF RF group. This package uses subroutine records which
are scanned periodically and maintain their internal state machines.
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| Group Leader ISAC Controls Fax: (604) 222-7307 |
| and Electronics Development |
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