User manual - ATR227 - 23
52  c. t.  Cycle Time (Password 5678)
(for P.I.D. on remote control switch 15 sec., for P.I.D. on SSR 1 sec.)
1-300 seconds (Default:15s) If par.6 
c.out
 is set as 
c.SSr
, (Default:2s).
53  L.L. o .P.  Lower Limit Output Percentage (Password 5678)
Selects min. value for command output percentage
0..100%, Default: 0%.
54  U.L.o.p.  Upper Limit Output Percentage (Password 5678)
Selects max. value for command output percentage
0 – 100%, Default: 100%.
55  s.d.tu.  Setpoint Deviation Tune (Password 5678)
Selects the deviation from the command setpoint for the threshold used by
autotuning to calculate the P.I.D. parameters
0.0-500.0°C/°F. Default: 30.0.
56  m.G.tu.  Max Gap Tune (Password 5678)
Selects the max. process-setpoint gap beyond which the automatic tune 
recalculates PID parameters
0.1..50.0°C/°F. Default: 1.0°C
57  mn.p.b.  Minimum Proportional Band (Password 5678)
Selects the min. proportional band value selectable by the automatic tune.
0.0..100.0°C/°F. Default: 5.0°C
58  ma.p.b.  Maximum Proportional Band (Password 5678)
Selects the max. proportional band value selectable by the automatic tune.
0.0..300.0°C/°F. Default: 50.0°C
59  m n .i . t.  Minimum Integral Time (Password 5678)
Selects the min. integral time value selectable by the automatic tune.
0.0..999.9 secondi. Default: 40.0s.