On Command

Overview

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

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.On() Command:

   • When the On() command is executed, the SpsStation sequentially powers on each MccsTile device.

   • The process is staggered with a few seconds delay between each MccsTile. Future enhancements may include dynamic calculation of this delay.

2. MccsTile.On() Command:

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

3. MccsSubrack.On() Command:

   • Currently, the MccsSubrack 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 provides power to connected antennas.

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

Power Management Workflow

1. FieldStation.On() Command:

   • The FieldStation directly commands the MccsFNDH to power on specific ports, enabling power to the relevant Smartboxes.

   • It then commands the MccsSmartbox devices to power on specific ports that have antennas attached, provided those antennas are not masked.

   • The MccsFNDH and MccsSmartbox devices send the necessary commands to the MccsPasdBus to ensure proper communication with the PaSD hardware.

2. MccsSmartbox.On() Command:

   • The MccsSmartbox currently does not have a meaningful On() command, as the knowledge of port mappings is managed directly by the FieldStation.

3. MccsFNDH.On() 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.On() Command:

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

   • It waits for the completion of these commands to ensure that all associated hardware components are powered on in the correct sequence.

2. MccsController.On() Command:

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

   • The power-on process is coordinated across multiple stations, ensuring a smooth startup of the entire MCCS subsystem.

Command Flow

The workflow above in diagrammatic form: