# Name: M_PCONSCB # # Date: # # created: 07 27 1994 SDW # revisions: 08 08 1994 SDW # # Change Description # # 1 removed limits to M_VLIMIT # # MDI Author: Scott Williams 415-725-0482 # # Description # # This procedure powers up the MDI instrument with the primary # MDI power converters on the spacecraft redundant power interface (B) # and primary telecommand and telemetry interfaces. It powers on # PC1, PC2, DEP and AE. It is initiated with MDI in OFF mode and # if successful completes with MDI in SLEEP mode. # # Intended Use # # Controlled initial power on of MDI from OFF to SLEEP # # Duration # # ? # # Requirements and Constraints # # Medium rate telemetry support required for duration of power on # sequence. MDI Operator on station to support verification of # procedure. MDI operator verification required for each step # before continuing. # # Steps # # Step Description Command Monitor Value # 1 prepare MDI for power on # 2 verify MDI power off MIPWA ~0. # MSPWA "OFF" # MIPWB ~0. # MSPWB "OFF" # 3 command MDI all off mcallofn # 4 switch MDI power converters to A bus mcpc1bn mspc1n "A" # mcpc2bn mspc2n "A" # mcrc1bn msrc1n "A" # mcrc2bn msrc2n "A" # 5 s/c bus B power on KNMPWBNN MSPWB "ON" # MIPWB ~0. # 6 send ALL OFF command mcallofn mspwdpn "OFF" # mspwaen "OFF" # 7 switch pc2 to B bus mcpc2bn mspc2n "B" # 8 record MDI current MIPWB ~0.3 # 9 switch on DEP mcdponn mspwdpn "ON" # 10 record MDI current MIPWB ~0.4 # 11 switch on apps electronics mbpwaeon # 12 reset DEP to recover from AE power up mcdprstn # 13 resend AE power on to get correct mbpwaeon mspwaen "ON" # DEP power indication. # 14 tell DEP that prime 160k telemetry mbpwtm1o # interface is selected. # 15 set DEP local on-board time mbslobt # 16 reset all motor controllers mbshrs # mbm1rs # mbm2rs # mbpars # mbc1rs # mbc2rs # mbfdrs # mbam1rs # mbam2rs # 17 switch pc1 to B bus mcpc1bn mspc1n "B" # 18 record MDI current MIPWB ~0.7 # 19 check AE and TM select status mkpwae "ON" # mktmsel "1" # mstmseln "1" # 20 message to MDI Operator # "Print out Power System display page." # 21 end of procedure