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  1. Ensure Aperture Cover is closed.

  2. Reset GIS using front panel button.

  3. Reset GIS faults using engineering screen on HMI.

  4. Verify that Aperture Cover is not forced closed by the GIS.

Bypass Procedure

Info

This procedure only bypasses the signal from the EMCS to the GIS indicating the drives are ready-to-start. As written, it is only intended to bypass long enough to affect a reset of the drives without tripping the GIS’s light path logic. Do not leave the bypass active.

  1. Toggle ApCover_Ready_Bypass in the EMCS PLC on. (Rung 31 of program EMCS_to_LIC in the Main Task)

  2. Open Aperture Cover fully.

  3. Reset Aperture Cover Drives (if faulted).

  4. Verify ApertureCover_Drives_RTS is on.

  5. Toggle ApCover_Ready_Bypass in the EMCS PLC off.

  6. Verify Comm_EMCS_to_LIC.DATA[17].3 remains on.

  7. Open M1 cover normally.

  8. Observe.

  9. Profit.