Off Command

Overview

This document details the Off() command within the MCCS, covering the three primary repositories in MCCS: SPSHW, PaSD, and the Main repository.

Note: This command is current not implemented in SpsStation as we do not have control of the upstream power of the subracks. As such MccsStation currently calls SpsStation.Standby().

SPSHW Repository

Devices

• MccsTile: Controls the TPM (Tile Processing Module). For more detailed information, see MccsTile Overview.

• MccsSubrack: Manages the subrack containing TPMs. Note: Power control for the subrack is currently unimplemented due to the absence of PDU devices, which are planned for future development.

• SpsStation: The central controller for the MccsTile and MccsSubrack devices.

Power Management Workflow

1. SpsStation.Off() Command:

   • The SpsStation sends an Off() command to the MccsTile devices.

   • The MccsTile devices then turn off.

   • The SpsStation sends an Off() command to the MccsSubrack devices.

   • The MccsSubrack devices then turn off.

2. MccsTile.Off() Command:

   • The MccsTile sends a request to the MccsSubrack to turn off power upon receiving the Off() command.

3. MccsSubrack.Off() Command:

   • The MccsSubrack currently lacks power control due to the absence of PDU devices.

Future Development

• PDU Integration: The MccsSubrack will be updated to include power control once the PDU devices are developed and integrated.

PaSD Repository

Devices

• MccsPasdBus: A Modbus device that communicates with PaSD hardware, including FNDH (Field Node Distribution Hub) and Smartboxes.

• MccsFNDH: Manages the FNDH, which provides power to connected Smartboxes.

• MccsSmartbox: Controls a Smartbox, which distributes power to connected antennas.

• FieldStation: The main controller for the MccsFNDH and MccsSmartbox devices.

Power Management Workflow

1. FieldStation.Off() Command:

   • The FieldStation sends a PowerOffPorts() command to the MccsFNDH.

   • The MccsFNDH then powers on the relevant set of ports (if not already powered off), thereby powering off the Smartboxes.

2. MccsSmartbox.Off() Command:

   • The MccsSmartbox commands the MccsPasdBus to power off the FNDH port it is attached to, if not already powered off.

3. MccsFNDH.Off() Command:

   • The MccsFNDH is considered to be always ON as we do not have control of upstream power supply.

Main Repository

Devices

• MccsStation: The top-level controller for both SpsStation and FieldStation.

• MccsController: Manages multiple MccsStation devices, each responsible for a different station.

Power Management Workflow

1. MccsStation.Off() Command:

   • The MccsStation sends the Off() command to the SpsStation and FieldStation.

   • It waits for the completion of these commands to ensure that all associated hardware components are powered off correctly.

2. MccsController.Off() Command:

   • The MccsController initiates the power-off process by sending the Off() command to each MccsStation.

Command Flow

The workflow above in diagrammatic form: