Brainchild P91 - Page 49

Coolonlycontrol:ON-OFFcontrol,P(orPD)control andPID
control can be selected for cool only control through Output 1. Set
OUT1 to , or , the other functions for
control, control and control
are same as descriptions for heat only control except that the output
variable ( and action ) for the cool control is inverse to the heat
control.
cool only
ON-OFF cool onlyP(PD) cool only PID
Cool only control: ON-OFF control, P ( or PD ) control and PID
control
can be selected for cool only control through Output 1. Set
OUT1
to , or , the other functions for
control, control
and control
are
same as descriptions for heat only control except that the output
variable
( and action ) for the cool control is inverse to the heat
control.
cool
only
ON-OFF cool
only P ( PD ) cool only PID
Heat only PID control : Set or for OUT1 and non-zero
value of proportional band and integral time. Perform auto-tuning to
the new process, or set correct values for PB1, TI1 and TD1. If the
control result is still unsatisfactory, then perform manual tuning to improve
the control. See section 3-11 for manual tuning. The unit contains a
algorithm to achieve a
to the process if it is tuned properly.
very clever PID and fuzzy very small overshoot
and very quick response
Heat only PID control : Set or for OUT1 and non-zero
value
of proportional band and integral time. Perform auto-tuning to
the
new process, or set correct values for PB1, TI1 and TD1. If the
control
result is still unsatisfactory, then perform manual tuning to improve
the
control. See section 3-11 for manual tuning. The unit contains a
algorithm
to achieve a
to
the process if it is tuned properly.
very
clever PID and fuzzy very small overshoot
and
very quick response
Heat - Cool control: Three types of combination for heat-cool
control are available as shown in table 3.1. The case1~case3 in
Fig 3.3 show the heat PID and cool PID operation. The case 4
show the heat PID and cool ON-OFF operation.
Heat - Cool control:
0%
Output
Power (%)
Process value
100%
DB
negative
(overlap)
CPB
PB1 or PB2
Output 1
Output 2
Output 2
Output 1
Case 1Case 1
UM0P411A
48