13.2.34. power_supply_DC

Interface for power supplies used for DC charging

Implementation guidelines for this interface: 1) During start up of the driver, publish capabilities as soon as they are available, ideally in ready() function.

The charging logic in EvseManager will not allow any charging until it receives the capabilities at least once.

Capabilities may be published at any later point in time to update the values. This may happen if they e.g. change due

to thermal derating etc. If a charging session is active when the update is received,

only power/current limits will be applied immediately. All other values will become active at the next charging session.

2) setMode/setVoltageCurrent commands should be executed on the hardware immediately. If this is not possible because an error is currently active

(e.g. communication to the hardware is lost), the driver module shall cache the last mode and voltage/current settings.

Once the PSU is back on-line (e.g. after a CommunicationFault), set the last mode and voltage/current value received and only after that clear the error.

3) var voltage_current shall be published on regular intervals. The interval depends on the hardware, but it shall be at least once per second. If possible,

update at e.g. 4 Hertz is recommended.

13.2.34.1. Variables

voltage_current:object (power_supply_DC-VoltageCurrent)

Voltage/Current at the input/output

There is an extended definition for this object here.

mode:string (power_supply_DC-Mode)

Current mode. Published on change.

There is an extended definition for this object here.

capabilities:object (power_supply_DC-Capabilities)

Publish capabilities of this PSU.

There is an extended definition for this object here.

13.2.34.2. Commands

setMode:void

Set operation mode of the bidirectional DC power supply

value:string <required> (power_supply_DC-Mode)

Operation mode of power supply

There is an extended definition for this object here.

setExportVoltageCurrent:void

Set output target voltage limit. Must be within reported limits.

voltage:number <required>

Output voltage in Volt

current:number <required>

Output current limit in Ampere

setImportVoltageCurrent:void

Set minimal import voltage and current limit. Must be within reported limits.

voltage:number <required>

Current will be drawn if input is above this voltage (in Volt)

current:number <required>

Input current limit in Ampere