Special PVs

Baton

In order to arbitrate access to the beamline between Hyperion and GDA there are two baton string PVs REQUESTED_USER and CURRENT_USER.

Hyperion will only start operating once REQUESTED_USER has been set to Hyperion, at which point it will set CURRENT_USER. To request the baton from Hyperion, set REQUESTED_USER to some other value, when Hyperion completes the current action, it will relinquish CURRENT_USER.

Commissioning Mode

The baton device also has a COMMISSIONING PV, which when the PV is set to 1, indicates that commissioning mode is enabled.

Commissioning mode enables testing of Hyperion when there is no beam. Beamline scientists should ensure that the COMMISSIONING PV is set to 0 before running Hyperion in production.