9
12.
ON-OFF CHARACTERISTIC TYPES
CAUTIONS:
Parameter name
Parameter number (p. 10, table 1)
7
8
9
13.
PID REGULATION
Controller works in PID mode when proportionality
range (parameter 12:
) is different than zero.
Proportionality range
position relative to set value
is shown on illustrations a) and b). Influence of
integral and derivative part of PID regulation is set by
parameter 13:
and 14:
. Parameter 15:
sets
pulsation period for output P1 or SSR1 (optional).
Output state correction is performed every 1 second.
The principle of operation for P type regulation
(proportional control) for output P1 or SSR1 is shown in
the illustration c), d). To select PID parameters suitable
for certain regulation object it’s recommended to use
automatic settings selection – autotuning (chapter 14).
Information about manual PID parameters selection
and correction can be found in chapter 15 and 16.
Illustration. Principle of operation for PID regulation:
a)
Proportionality range position
related to set
value
for heating (
).
b)
Proportionality range position
related to set value
for cooling (
).
c)
Duty cycle for relay output P1 or SSR1.
d)
P1 relay output or SSR1 output state (for measured value within proportionality range).
