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Space Shuttle Avionics: Difference between revisions
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→Data transmission errors
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There are two special situations in which non-standard screens appear - an IDP may lose communication with a GPC and hence be unable to display DPS screens, and an MDU may lose contact with its driving IDP and hence not be able to display any information. | There are two special situations in which non-standard screens appear - an IDP may lose communication with a GPC and hence be unable to display DPS screens, and an MDU may lose contact with its driving IDP and hence not be able to display any information. | ||
If the IDP cannot exchange information with a GPC, the DPS part of the screen appears crossed out to signal that it is no longer updated. In addition, the MEDS system throws a | If the IDP cannot exchange information with a GPC, the DPS part of the screen appears crossed out to signal that it is no longer updated. In addition, the MEDS system throws a POLL ERROR message. | ||
[[File:Shuttle avionics crossed.jpg|600px|DPS screen with IDP polling error]] | [[File:Shuttle avionics crossed.jpg|600px|DPS screen with IDP polling error]] | ||