I would like to contract someone to create a Microchip microcontroller
based interface to the Allen Bradley DH485 network. The communication
protocol is documented in one of their publications but I don't have the
time to dedicate to learning it. I have the following requirement / wish
list for this "Interface Microcontroller":

- A Microchip microcontroller (STAMP? or 16C/17C series processor) based
interface to communicate with a SLC500 Programmable Logic Controller (PLC)
at 9.6 or 19.2KBaud.

- Must be able to re-establish communications upon disconnect or error and
must incorporate the protocols CRC.

- Communications to this "Interface Microcontroller" from another
microcontroller to be either RS232 or IC2.

- I would like to be able to send commands to tell the interface
microcontroller which file type and how many words to read or write.

- I would like to be able to communicate in the DH485 network that could
consist of 2 to 31 devices addressed as device numbers 0 - 31.  I would
like to be able to set the "Interface Microcontrollers" device address over
the RS232 or IC2 communication channel.

Would require a breadboarded, working prototype.

If you are familiar with Allen Bradley's DH or DH485 communications and
would like to quote on the above project feel free to call or send e-mail.

James_Fillmore@XYZTech.com
http://www.XYZTech.com
 XYZ Technologies, Inc
5510 Gatewood
Sterling Heights, MI 48310
(810) 939-9715 (fax (810) 939-4514)