improved cyoltd (flame magnet)

- use a statemachine
- do more control in frappy, switching from persistent to driven
  internally
- a lot of fixes

cfg/main/flamemag.cfg

@@ -10,10 +10,11 @@ io= cio
 
 [B]
 description = 'magnetic field'
-class = secop_psi.cryoltd.MainMagfield
+class = secop_psi.cryoltd.MainField
 channel = Main
 constraint = 80000
 target.max = 35000
+mode = 'PERSISTENT'
 hw_units = T
 # A_to_G is needed for ramp rate
 A_to_G = 285.73
@@ -21,6 +22,7 @@ ramp.max = 412
 overshoot = {'o': 1, 't': 180}
 degauss = {'s': 500, 'd': 30, 'f': 5, 't': 120}
 tolerance = 5
+wait_stable_field = 180
 
 [Bx]
 description = 'magnetic field x component'