Proportional
band
This parameter specifies the pro-
portional band coefficient that mul-
tiplies the error (SP - PV)
Integral time
It 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.
Derivative
time
It is 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.
Control output
cycle time
Cycle time
cool
It’s the cycle time of the logic con-
trol output. The PID time propor-
tional control output is provided
through the pulse width modula-
tion of the digital waveform.
#t.c. C
#t.c.
#t.d.
#t.i.
#p.b.
29
4 - Operations
4.5 PARAMETERS
The controller parameters have
been organised in group, accord-
ing to their functionality area.
AL2 alarm
threshold
AL3 alarm
threshold
The alarm occurrences handle the
OP1, OP2 and OP3 outputs, in dif-
ferent ways, according to the con-
figured types of alarms, as illus-
trated.
With Heath/Cool action control
output, AL2 and AL3 share in or
mode the same output (the free
one) (see table on page 13)
#A3s.p
#A2s.p
FIRST GROUP
