EIR-OPS-007: Operational Mode Change

Objective

To determine and/or change the current Operational Mode of the spacecraft.

Introduction

Using this procedure, the Operator can determine EIRSAT-1’s current Operational Mode. The procedure also contains details on how to prompt a mode change via TC. EIRSAT-1’s Operational Modes are shown in Figure 1.

Note

Communication with the spacecraft is required throughout this procedure.

Figure 1 - EIRSAT-1’s Operational Modes.

Procedure

A. Configuring Mode Entry Settings

Important

You are about to send the first TC of this procedure - Have you completed the EIR-OPS-003: Start a Communication Pass procedure? A Communication Pass must be started prior to carrying out the operations planned for the pass. Don’t forget to set up the parameters/actions that will be used during the pass in MCS before the pass begins!

A.1.

• If the Operator is not intending to transition to Nominal Mode as part of this procedure, proceed immediately to Section B.

• Else, Get the parameter mission.ModeManager.NominalEntryEPSSwStatesBitmap .

• Take note of the TM returned for use in the next step.

TC Details
MCS Operation	Get
Action/Param Name	mission.ModeManager.NominalEntryEPSSwStatesBitmap
Data Expected with TC	No
TM Details
Data Expected from TC	NominalEntryEPSSwStatesBitmap ( + ACK )
Data Size	2 bytes
Data Info	A bitmap describing the switch states to be set for the 10 EPS PDMs
Allowed Value(s)	0000 - 03FF (Hex)

A.2.

• The TM returned in the previous step is a bitmap describing the PDM switch states that will be set by the OBC while transitioning to Nominal Mode, where the LSB = PDM 1

  • E.g. 0x3A4 / b1110100100, will turn on PDMs 3, 6, 8, 9 and 10.

• The Operator should review this TM and ensure the desired PDMs will be powered on/off on entry to Nominal Mode.

• If the value is already as desired, proceed to Section B.

• Else, Set the parameter mission.ModeManager.NominalEntryEPSSwStatesBitmap to the desired value now.

TC Details
MCS Operation	Set
Action/Param Name	mission.ModeManager.NominalEntryEPSSwStatesBitmap
Data Expected with TC	Yes
Data Size	2 bytes
Data Info	A bitmap describing the switch states to be set for the 10 EPS PDMs
Allowed Value(s)	0000 - 03FF (Hex)
TM Details
Data Expected from TC	No ( + ACK )

A.3.

• Confirm the Set in the previous step with a Get (i.e. confirm the value was set successfully).

B. Transitioning Modes

B.1.

• To confirm which mode EIRSAT-1 is currently operating in, Get the mission.ModeManager.Mode parameter.

TC Details
MCS Operation	Get
Action/Param Name	mission.ModeManager.Mode
Data Expected with TC	No
TM Details
Data Expected from TC	Mode ( + ACK )
Data Size	1 byte
Data Info	Current Operational Mode of EIRSAT-1
Allowed Value(s)	00 - 04 (see table below)

Where…

Mode	Operational Mode
00	Separation Sequence
01	Commissioning
02	Nominal
03	WBC
04	Safe

B.2.

• To transition to a new Operational Mode, Invoke the applicable mission.ModeManager.transitionTo... action from the following list of actions…

  • mission.ModeManager.transitionToSeparationSequenceMode,

  • mission.ModeManager.transitionToCommissioningMode,

  • mission.ModeManager.transitionToNominalMode,

  • mission.ModeManager.transitionToWBCMode, or

  • mission.ModeManager.transitionToSafeMode

Warning

Entering Safe Mode from Separation Sequence Mode is a prohibited transition.

TC Details
MCS Operation	Invoke
Action/Param Name	mission.ModeManager.transitionTo...
Data Expected with TC	No
TM Details
Data Expected from TC	No ( + ACK )

B.3.

• To verify that the action was invoked successfully, Get the mission.ModeManager.Mode parameter.

TC Details
MCS Operation	Get
Action/Param Name	mission.ModeManager.Mode
Data Expected with TC	No
TM Details
Data Expected from TC	Mode ( + ACK )
Data Size	1 byte
Data Info	Current Operational Mode of EIRSAT-1
Allowed Value(s)	00 - 04 (see table above)
Expected Value(s)	Mode transitioned to in Step B.2

B.4.

• To assess whether the mode change occurred without error, Get the mission.ModeManager.ExitErrorCount parameter.

• Ensure 0 is returned.

TC Details
MCS Operation	Get
Action/Param Name	mission.ModeManager.ExitErrorCount
Data Expected with TC	No
TM Details
Data Expected from TC	mission.ModeManager.ExitErrorCount ( + ACK )
Data Size	1 byte
Data Info	Error count from last mode exit
Allowed Value(s)	00 - FF (Hex)
Expected Value(s)	0 (i.e. no errors)

B.5.

• Also Get the mission.ModeManager.EntryErrorCount parameter.

• Ensure 0 is returned.

TC Details
MCS Operation	Get
Action/Param Name	mission.ModeManager.EntryErrorCount
Data Expected with TC	No
TM Details
Data Expected from TC	mission.ModeManager.EntryErrorCount ( + ACK )
Data Size	1 byte
Data Info	Error count from last mode entry
Allowed Value(s)	00 - FF (Hex)
Expected Value(s)	0 (i.e. no errors)

B.6.

• If further verification of the current Operational Mode is desired (e.g. following a first-time mode transition), Get the parameters from the below table.

• Where expected/default values are provided, compare them to their expected values for each of the Operational Modes.

Note

In the below table, where cells have been left blank, there is no default value applied to that parameter on entry to that mode. NominalEntryEPSSwStatesBitmap is configurable via TC.

Mode	Separation Seq. (00)	Commissioning (01)	Nominal (02)	WBC (03)	Safe (04)
platform.EPS.actualSwitchStatesBitmap	0x200 (PDM 10 On)		NominalEntryEPSSwStatesBitmap		0000 (All PDMs Off)
platform.ADCS.adcsModeState	00000000 (Standby)	00000000 (Standby)		0x5550AAA8 (Test)	00000000 (Standby)
cdh.scheduling.CriticaEventAction.enabled	0 (Disabled)	1 (Enabled)	1 (Enabled)	1 (Enabled)	0 (Disabled)
platform.CMC.txConvEnabled					1 (Enabled)
mission.SeparationSequence.State	0x00 - 0x09 (SS on-going)	0x42 (Finished State)	0x42 (Finished State)	0x42 (Finished State)	0x42 (Finished State)
mission.ADCSManager.enabled	0 (Disabled)				0 (Disabled)
cdh.monitoring.WBCMonitor.enabled		0 (Disabled)		1 (Enabled)	0 (Disabled)
payload.WBC.Enabled		0 (Disabled)		1 (Enabled)	0 (Disabled)

END OF PROCEDURE