Interlock Defeat

System(s) Affected:
Targets

Interlock to be Defeated:
BL2C4 STF Supply Resistivity

Implementation:	Number:
Date: 2023-10-12 Time: 16:45:00	2023-563
Implemented By: Kevin Lucow
In Consultation With:

Status: Removed

Estimated Duration:
99 weeks

Reason for Defeat:
STF Supply Resistivity reads "PLCDat" error causing cyclotron trip. This is a known problem; see Fault 13917. This signal should be used as a diagnostic readback only, and not as an interlock.

*Do not remove this defeat until supply resistivity signal has been removed as a BL2C4 interlock.

Number of Yellow Tags:
2

Location of Defeat Tag(s):
1) MCR Defeat Board. 2) SAB2 rack 1A.

How Was Defeat Implemented?
Where is Defeat Located?:
SAB2, rack 1A, BYP-043.

Describe Alternate Protection:
STF Return Resistivity and other STF interlocks active.

Fault Reports:
16358, 13917

Work Permits:

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-04-19 Time: 16:45:00	2023-563
Removed by: Kevin Lucow

Status: Removed

Interlock Verification Method:
Fuse replaced under C2024-03-20-7. Device is working properly again, defeat retired at the request of Louis M.

Number of Tags Removed:
2

Comments:

Interlock Defeat / Device Disable Management System v1.5 (Driver)

Interlock Defeat

Interlock Defeat

Interlock Defeat / Device Disable
Management System v1.5 (Driver)