Instruction manual

46
(3) Derivative time (D)
Derivative action is used to restore the change in the processing temperature (PV)
according to the rate-of-change. It reduces the amplitude of overshoot and undershoot
width.
If the derivative time is shortened, the restoring value becomes smaller, and if the
derivative time is extended longer, an excessive returning phenomenon may occur
and the control system may oscillate.
(4) ARW (Anti-reset windup)
ARW (Anti-reset windup) prevents overshoot caused by the integral action. The smaller
the ARW value, the less the overshoot caused by the integral action in the transition
status, however stabilization will take some time.
When setting ARW manually, set it to the closest MV (manipulated variable) when the
control is stabilized.
8.2 Standard action
Heating (reverse) control action Cooling (direct) control action
Proportional band
(OUT1) Green
Indicator
Lit
: Turns ON (lit) or OFF (unlit).
Cycle action is performed
according to deviation.
Cycle action is performed
according to deviation.
Changes continuously
according to deviation.
OFF
ON
OFF
ON
+
-
12V DC
+
12/0V DC
+
0V DC
+
0V DC
+
12V DC
+
0/12V DC
+
20mA DC
+
4mA DC
+
4mA DC
+
20mA DC
+
4 to 20mA DC
H
C
L
H
C
L
H
C
L
H
C
L
H
C
L
H
C
L
+
20 to 4mA DC
Cycle action is performed
according to deviation.
Cycle action is performed
according to deviation.
Changes continuously
according to deviation.
LitUnlitUnlit
Control
action
SV
Proportional band
Relay contact
output
Non-contact
voltage output
DC current
output
SV
R/
S/
A/
5
6
4
5
6
4
5
6
4
5
6
4
5
6
4
5
6
4
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6
5
6