Subject: Re: [sloan-25mlog 7323] 2.5m obslog 20240708 (SJD 60500)
From: John
Date: Tue, 9 Jul 2024 04:52:31 -0600
> On Jul 9, 2024, at 4:39 AM, asimmons--- via sloan-25mlog =
 wrote:
>=20
>=20
>                       APACHE POINT OBSERVATORY SDSS 2.5M
>=20
>                                 OBSERVING LOG
>                          Monday July 08, 2024
>=20
>                                  (SJD 60500)
>=20
> ----  Observing Team ----
>=20
> Audrey Oravetz=20
>=20
>=20
>=20
> ---- Engineering Issues ----
>=20
> All FF lamps do not seem to be working. When commanded to turn on, the =
MCP flagged the error ...
> 08:10:34 .mcp 0 mcp ! controlLamps
> 08:10:34 .mcp 0 mcp ! command=3D"FFL_ON"
> im_ff_wht_on_pmt:0
>=20
> No lamps visually turn on and there is no light within the afternoon =
flat image.=20
>=20
> The arc lamps (HgCd and Neon) work just fine and turn on and off when =
commanded, indicative of a disconnect between the MCP and the lamp =
controller and not a problem with the MCP. Engineers - please take a =
look.=20
Most likely going to be a PLC problem.  It=E2=80=99s logic is the lamp =
controller and the only part besides the MCP that is common to all four =
lamps.  I will likely be late this morning, I=E2=80=99m dropping the dog =
off at the vet for a dental cleaning, will be in after that.=