IM-P323-25 CH Issue 3
30
The controller parameters have been
organised in groups, according to their
functionality.
5.5 Parameter description
First Group
This parameter specifies the
proportional band coefficient that
multiplies the error (SP - PV)
The alarms use OP1, OP2 and OP3
outputs in different ways, according to
the configured types of alarms, as
illustrated.
With double action control output,
(VMD or heating and cooling).
There is only one control output left.
Alarm AL2 and AL3 will share the
same output. (see table on page 14).
AL3 alarm
threshold
AL2 alarm
threshold
Integral
time
Derivative
time
Cycle time
cool
Control output
cycle time
This is the cycle time of the logic
control output.
The time required by the
proportional term P to repeat the
output provided by the derivative
term D. When Off the derivative
term is not included in the control
algorithm.
The integral time value 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.
A2S.P
A3S.P
Proportional
band
P.b
t.
¡
.
t.d.
t.c.
t.c.
C
