Super Systems X5 - Manual (Page 49)

49
4 - Operation
4.5.3 PID MENU
Not present with On-Off main
output or Timer PID = 0.
Proportional
Band
Cool Proportional
Band
This parameter specifies the
proportional band coefficient
that multiplies the error (SP - PV)
Integral
Time
Cool integral
Time
This is the integral time value that
specifies the time required by the
integral term to generate an output
equivalent to the proportional term.
When Off, the integral term is not
included in the control algorithm.
#t.i. C
#t.i.
#p.b. C
#p.b.
Derivative
Time
Cool Derivative
Time
This is the time required by the
proportional term P to reach the
level of D. When Off it is not
included in the control algorithm.
Overshoot
control
(Automatically disabled when the
adaptive tune is running)
This parameter specifies the
span of action of the overshoot
control. Setting lower values
(1.00—>0.01) the overshoot
generated by a Setpoint change
is reduced. The overshoot con-
trol doesn’t affect the effective-
ness of the PID algorithm.
Setting 1, the overshoot control
is disabled.
#O.C.
#t.d. C
#t.d. Manual
reset
This term specifies the value of
the control output when PV = SP,
in a PD only algorithm (lack of
the Integral term).
Error
Dead Band
Inside this band for (PV - SP),
the control output does not
change to protect the actuator
(output Stand-by).
#d.err
#M.res
4.5.4 TUNING MENU
(not shown for ON-OFF
main control output)
See page also 57
Two tuning method are provided:
• Initial one shoot Fuzzy-Tuning
• Continuous, self learning
Adaptive Tuning
The Fuzzy-Tuning automatically
determines the best PID term with
behaviour respect to the process.
The controller provides 2 types
of “one shot” tuning algorithms,
that automatically are selected
according to the process con-
ditions when the tune operation
is started.
STEP response
SP
End of the tuning
operating and
setting of the new
calculated terms
Start of autotune
operation
Setpoint change
PV variable
Control output
X5-SSI-uk 18-03-2009 17:54 Pagina 49