DC Magnet

Property Layout

FESA3 Standard properties and value items

Setting properties

IMPORTANT: Every setting property has standard items to the ones listed here.

property name	prop. type	field	type	unit	meaning	impl
Init	init					not yet
Reset	reset				Resets InterlockBits (if not set anymore)	not yet
Setting	setting	current	double	ampère	Reference value to be set in the device
Power	power	power	DEVICE_MODE_POWER (enum -> int)		ON=1 / OFF = 2

Acquisition properties

IMPORTANT: Every acquisition property has standard items to the ones listed here.

property name	prop. type	field	type	unit	comment	impl
Status	status	detailedStatus	int	See extra table	See extra table
		standard status items			standard items for status property
Acquisition	acquisition	current	double	ampère	Actual value for current of the device
		currentSet	double	ampère	Reference value set in the HW device
		saturation	double	0..1	ration current / max current	indicates how much power supply is loaded
Version	version	standard version items			standard items for version property

All acquistion properies implement an internal "onChange" behaviour.

Field meaning

detailedStatus[i]	meaning
0	Voltage (ok/low)
1	Temperature PS (ok/high)
2	Cooling Water PS (ok/fail)
3	Current (ok/exceeded)
4	Inverter (default/invers)
5	Temperature Magnet (ok/high)
6	Cooling Water Magnet (ok/fail)
7 - 14	... (see MX document)
15	Magnet 1 (connected/not)
16	Magnet 2 (connected/not)
17	Magnet 3 (connected/not)
18	Magnet 4 (connected/not)
19	Magnet 5 (connected/not)

Configuration possibilities:

Item	Meaning
current_max	maxVal for current
current_min	minVal for current
calibration_constant	?
degaussing_subtype	Is degaussing magnet?
powerSupplyType	MFU / DUMMYFILE / (future)
powerSupplyNumber	One Mfu is able to handle up to 4 devices. This is the Mfu internal number. (dummy also allows to specify this)

Specifics

Power supplies to be used in the ion sources of the CRYRING have two reference values, one for current and one for voltage. Either of these two is the set value, the other sets an upper limit.

Not yet understood completely. However, it looks like both values set the upper limet for the output. The value which is exceed first will limit the output. E.g. operating a power supply set to 200 Volts and 1 Ampere at a load of 100 Ohm would result in 100 VOlt at 1 Ampere (current is limited) while operarting the same setting at a load of 1000 Ohm would result in an output of 200 Volt and 200 mAmpere (voltage is limiting).

FESA version

0.8.x (deprecated version: 3.0-beta)

Nomenclatures

PLLEKV1 (Vertical Steerer PS 1)
PLLEKH1 (Horizontal Steerer PS 1)
PLLEKV2 (Vertical Steerer PS 2)
PLLEKH2 (Horizontal Steerer PS 2)
PLLEMO1 (Solenoid PS 1)
PLLEMO2 (Solenoid PS 2)

Alle Sollwerte: 0 - 325 A

ToDo

• Naming will be like:
  • Setting value: foo
  • Acqusition value:
    • Measured in HW device: foo
    • Setting value set in HW device: fooSet (NOTE: This is different to the setting value foo)

• Combining MX and MD:
  • Started with the use of two different RT Actions. One is evoked by the Prop (for DcMagnets) and the other listens to timing events (for Pulsed Magnet)
  • IMPORTANT: Postponed for later developments!

• State machine
  • Can we check sth. like "is multiplexed" from within the code?
  • State machine is normal DEVICE_MODE enum plus some more states
  • Use two different.
• Min/Max values
  • Guideline says it should be sent with props.
  • Better idea:
    • Hold it as configuration constants in FESA class
    • Readable with prop Constants

• Harware status bits -> talk to EET
• Colored items are not implemented:

• ...

Deprecated property layout (used for B. Grasmücks dummy)

3.0-beta

property name	prop. type	field	type	unit	meaning
Status	status	status	DEVICE_STATUS	-	UNKNOWN/OK/WARNING/ERROR
		detailed_status	DETAILED_STATUS	-	See extra table
Power	power
Reset	reset
Init	init
Version	version
Setting	setting	currentS	float	ampère	Reference value for current of the device
CurrentS	setting	currentS	float	ampère	Reference value for current of the device
Acquisition	acquisition	detailed_status	DETAILED_STATUS	-	See extra table
		currentS	float	volt	Reference value for current of the device
		currentI	float	ampère	Actual value for current of the device
		voltageI	float	volt	Actual value for voltage of the device
VoltageI	acquisition	voltageI	float	volt	Actual value for voltage of the device
CurrentI	acquisition	currentI	float	ampère	Actual value for current of the device

Equipment Interfacing

Various types for connection to the equipment have to be supported:

• SCU/ACU, the FAIR standard
• MIL-bus interfaces, to allow re-using of existing GSI equipment
• MSL-interfacing, to connect to existing CRYRING equipment from Manne Siegbahn Laboratory, Sweden
  • is implemented as SCU with general digital I/O and ADC/DAC cards