PLC Choice Garza

Report on PLC choice from Omar Garza and Jonathan Creel, 22-Jun-2009. Review took place on 15-Jun-2009

Hall D PLC Hardware Review Comments:

1. Advantage : There has been significant work utilizing the Allen-Bradley PLC hardware and software within JLAB and other sister Labs.

2. Advantage: Software drivers and hardware can be utilized from other labs resulting in a proven and reliable system.

3. Advantage: Hall D personnel have utilized existing JLAB experts in software development and hardware implementation.

4. Disadvantage: Changing hardware would require additional research time, software development, training, and integration with a high impact on manpower requirements.

Although cheaper PLC hardware can be purchased, it would require additional software training and an increased learning curve, which I believe would offset the savings in hardware. Therefore, I do not feel there would be a cost savings by switching hardware at this time.

The overall cost of the PLC system was reasonable with potential savings if, multi-year quantities can be integrated into the procurement contract. Of course, that would have to be worked out with the vendor.

In summary, it is my opinion that the Hall D PLC system is well balanced by utilizing proven technology that is supported by JLAB and other sister LABS. Changing direction at this time would not result in significant project savings.

Sincerely,
Omar Garza
Engineering Division
Instrumentation, Controls, & Diagnostic Group Leader