Knob Help

General

To attach a device:

  1. Middle-click drag and drop a PV into the PV Name field OR
  2. Type a PV name into the PV Name field and hit carriage return

To detach a device, press the Detach button.

To knob a magnet, use the :BCTRL PV.

It is not possible to assign a PV field to a knob. For example, MGNT:TEST:1:BCTRL.VAL will not work, but MGNT:TEST:1:BCTRL will.

Terms

PV Name: Name of the attached PV

Status: Knob state. The four states are attaching, attached, detaching, detached.

Value: Current value of the attached device

Saved: Value of the attached device when you pressed 'Save Value'. This value can later be loaded by pressing 'Load Saved'.

Initial: Value of the attached device when it was first assigned to the knob. This value can later be loaded by pressing 'Load Initial'.

Sensitivity: Knob gain in units of device units/turn. This is set to (.HOPR-.LOPR)/10 or to the default value of .0001. The user can set this to any value. |

Troubleshooting

If you are unable to edit the PV Name field (or \"drop\" a PV into it), close the window and re-launch it.

  • No labels