
37
B
ef
or
e staring
Installation
Op
er
ation
Sp
ecifications
● 2 DOF PID Alpha (AP)
Response in general closed loop control system can be mainly divided into response to set value
change and response to disturbance, and existing PID (1 DOF) algorithm is limited to optimize only
one response for these two responses. 2 DOF algorithm was applied to overcome this limitation,
and response optimization to set value change and appropriate response to disturbance can be
obtained. Alpha (AP) parameter set value (SV) is used for adjusting response feature to set value
(SV).
ON
Relay run
ON
ON
OFF
MV = 30 %
= 3S
Control cycle (CT) = 10 sec.
Control cycle (CT) = 10 sec.
Control cycle (CT) = 10 sec.
MV = 50 %
= 5S
MV = 70 %
= 7S
OFF
● Output cycle (CT)
A cycle that becomes ON and OFF of RELAY or voltage pulse (SSR) output is called “output
cycle” and can be set at CT parameter. For RELAY output, if output cycle is set short, it can show
quick responses, but lifespan is shortened. Thus, setting output cycle less than 20 seconds is not
recommended.
175
155
135
115
95
75
55
35
0
100
Reference
Alpha 0
Alpha 50
Alpha 100
200
300
400
500
600
700
800
Содержание ML-D2H
Страница 1: ......