Vacuum System PLC Reprogramming Procedure
Updated 17 April 2007

1. Obtain permission to interrupt all vacuum interlocks. In order to test PLC
interlocks after reprogramming the PLC, you will need permission to do all of the
following invasive tasks:

a. Take away waveguide vacuum interlocks for 20-5, 20-6, 20-7, 20-8, and
21-2, which will inhibit RF for those stations.

b. Take away valve interlocks, which will cause valves VV01, VV02, VV03,
VV04, and VVS1 to close.

c. Break the gun waveguide vacuum summary, which will cause the laser
shutter to close. This prevents laser system operation.

d. Open and close valve VV01 for the tests.


2. Make sure the new PLC logic file meets the following requirements:

a. Controller Name has been updated with the date of the latest file

b. Tag PLC:IN20:VA01:CODEVERSION has the correct date


3. Insert key into PLC processor and switch to PROG mode.


4. Connect PC to PLC with serial cable. Open RSLogix software and download new
ladder logic to PLC.


5. Save new ladder logic to PLC nonvolatile memory, with the following settings:
Load image: “On Power Up”, Load mode: “Run (Remote Only)”. Put your name
and the date in the comment section. Upon loading the image to nonvolatile
memory, RSLogix will be disconnected from the PLC. It is not necessary to
reconnect.


6. Switch the PLC key switch to RUN mode and remove the key.


7. Switch the PLC power off and switch it back on.


8. Verify that the EPICS PV PLC:IN20:VA01:CODEVERSION shows the correct
code version.


9. Verify that the PV PLC:IN20:VA01:UPTIME shows the correct up time, in days
and hours.


10. Proceed with interlock tests:

a. Valve interlock test

b. RF interlock test (ST-384-904-01)