Metrohm tiamo 2.3 Patch 1 (process analysis) - Manual (Page 1644)

7.20 IO controller ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
1628 ￭￭￭￭￭￭￭￭ tiamo 2.3 Patch 1 (for Process Analysis)
ARW
K
P
Controller amplification/controller coefficient
P in feedback Input with which the input variable of the internal P element can be selec-
ted (see "Transfer function", page 1626). The standard setting is OFF.
T
n
Reset time. The I component is deactivated when this is parameterized to
T#0s.
T
v
Rate time. The D component is deactivated when this is parameterized to
T#0s.
D in feedback Input with which the input variable of the internal D element can be selec-
ted (see "Action diagram", page 1626). The standard setting is OFF.
T
d
Attenuation time
Upper limit Upper limit at which the integration is stopped and the output is limited
(ARW measure).
Note
This is not a guaranteed limit for the total output.
ARW only with I When this parameter is OFF (standard setting), the integration of the I
component is then paused when the entire controller output has reached
the upper or lower limit. The output can also thus be implicitly limited,
independently of the behavior of the input and the setpoint value (see
example below). If this parameter is ON, then the integration can be
paused when the I component (the integrator output) has reached a limit
(see "Action diagram", page 1626). The limit then no longer functions as
an absolute limit for the output, because the variable P and D component
also comes into play. The behavior of a normal PID controller, i.e. the
reflection of fluctuations of the control deviation at the output, is not lost
in the saturation.