Section 10.2.5 describes how the a Diffractometer PseudoMotor is specified in /online_dir/online.xml. In addition the environment variables DiffracDevice and Psi have to be set, e.g.:
p09/door/haso107d1.01 [2]: senv DiffracDevice controller/diffrace6c/e6cctrl p09/door/haso107d1.01 [3]: senv Psi pm/e6cctrl/4 p09/door/haso107d1.01 [4]: lsenv Name Value Type --------------- ------------------------------- ------ DiffracDevice controller/diffrace6c/e6cctrl str Psi pm/e6cctrl/4 str p09/door/haso107d1.01 [2]: wh H K L = 1.00000 1.00000 0.00000 Azimuth (Psi) = 180.00000 Wavelength = 1.54000 Delta Theta Chi Phi Mu Gamma 93.09800 46.54900 45.00000 90.00000 0.00000 0.00000