pcdsdevices.mpod.MPODChannel

class pcdsdevices.mpod.MPODChannel(channel_prefix, card_prefix=None, name='MPOD', **kwargs)

MPOD Channel Object.

Parameters:

channel_prefix (str) – The EPICS base of the MPOD Channel. E.g.: XPP:R39:MPD:CH:0
card_prefix (str, optional) – The EPICS base of the MPOD Module. XPP:R39:MPD:MOD:10
name (str) – A name to refer to the device.

Ophyd Device Components
Attribute	Class	Suffix	Docs	Kind
voltage	`EpicsSignal`	`:GetVoltageMeasurement`	MPOD Channel Voltage Measurement [V]	normal
max_voltage	`EpicsSignalRO`	`:GetMaxVoltage`	MPOD Channel Maximum Voltage [V]	normal
terminal_voltage	`EpicsSignalRO`	`:GetTerminalVoltageMeasurement`	MPOD Terminal Voltage [V]	normal
current	`EpicsSignal`	`:GetCurrentMeasurement`	MPOD Channel Current Measurement [A]	normal
max_current	`EpicsSignalRO`	`:GetMaxCurrent`	MPOD Channel Max Current [A]	normal
temperature	`EpicsSignalRO`	`:GetTemperature`	MPOD Temperature [C]	normal
status_string	`EpicsSignalRO`	`:GetStatusString`	MPOD Channel Status String	normal
state	`EpicsSignal`	`:GetSwitch`	MPOD Channel State [Off/On/Reset/EmerOff/ClrEvnt]	normal
voltage_high_limit	`EpicsSignal`	`:SetVoltage.DRVH`		normal

Methods

clr_evnt(): Clear Event.

configure(d: Dict[str, Any]) → Tuple[Dict[str, Any], Dict[str, Any]]

Configure the device for something during a run

This default implementation allows the user to change any of the configuration_attrs. Subclasses might override this to perform additional input validation, cleanup, etc.

Parameters:

d (dict) – The configuration dictionary. To specify the order that the changes should be made, use an OrderedDict.

Returns:

(old, new) tuple of dictionaries
Where old and new are pre- and post-configure configuration states.

describe() → OrderedDictType[str, Dict[str, Any]]

Provide schema and meta-data for read().

This keys in the OrderedDict this method returns must match the keys in the OrderedDict return by read().

This provides schema related information, (ex shape, dtype), the source (ex PV name), and if available, units, limits, precision etc.

Returns:: data_keys (OrderedDict) – The keys must be strings and the values must be dict-like with the event_model.event_descriptor.data_key schema.

emer_off(): Set the EmerOff state.

get(**kwargs)

Get the value of all components in the device

Keyword arguments are passed onto each signal.get(). Components beginning with an underscore will not be included.

get_max_voltage()

off(): Set mpod channel Off.

on(): Set mpod channel On.

post_elog_status(): Post device status to the primary elog, if possible.

read() → OrderedDictType[str, Dict[str, Any]]

Read data from the device.

This method is expected to be as instantaneous as possible, with any substantial acquisition time taken care of in trigger().

The OrderedDict returned by this method must have identical keys (in the same order) as the OrderedDict returned by describe().

By convention, the first key in the return is the ‘primary’ key and maybe used by heuristics in bluesky.

The values in the ordered dictionary must be dict (-likes) with the keys {'value', 'timestamp'}. The 'value' may have any type, the timestamp must be a float UNIX epoch timestamp in UTC.

Returns:: data (OrderedDict) – The keys must be strings and the values must be dict-like with the keys {'value', 'timestamp'}

read_configuration() → OrderedDictType[str, Dict[str, Any]]

Dictionary mapping names to value dicts with keys: value, timestamp

To control which fields are included, change the Component kinds on the device, or modify the configuration_attrs list.

reset(): Reset mpod channel.

screen()

Open a screen for controlling the device.

Default behavior is the typhos screen, but this method can be overridden for more specialized screens.

set_current(current)

Set mpod channel current in A.

Parameters:: current (number) – Current in A.

set_voltage(voltage)

Set mpod channel voltage in V.

Parameters:: voltage (number) – Voltage in V.

set_voltage_fall_rate(fall_rate)

Set the voltage fall rate in V/sec.

For the Low Voltage channels, it sets the voltage fall rate for each channel. For the High Voltage channels, it sets the voltage fall rate for the entire card.

Parameters:: fall_rate (number) – Voltage fall rate [V/sec].

set_voltage_rise_rate(rise_rate)

Set the voltage rise rate in V/sec.

For the Low Voltage channels, it sets the voltage rise rate for each channel. For the High Voltage channels, it sets the voltage rise rate for the entire card.

Parameters:: rise_rate (number) – Voltage rise rate [V/sec].

status() → str: Returns a str with the current pv values for the device.

stop(*, success=False): Stop the Device and all (instantiated) subdevices

summary()

trigger() → StatusBase

Trigger the device and return status object.

This method is responsible for implementing ‘trigger’ or ‘acquire’ functionality of this device.

If there is an appreciable time between triggering the device and it being able to be read (via the read() method) then this method is also responsible for arranging that the StatusBase object returned by this method is notified when the device is ready to be read.

If there is no delay between triggering and being readable, then this method must return a StatusBase object which is already completed.

Returns:: status (StatusBase) – StatusBase object which will be marked as complete when the device is ready to be read.

Attributes

configuration_attrs

connected

hints

kind

subscriptions: ClassVar[FrozenSet[str]] = frozenset({'acq_done'})