Yudian AI-208 - Parameter and Setting; Field Parameter Table; System Parameter Table

Yudian (H.K.) Automation Technology Co. Ltd.
Website: http://www.yudian.us
http://www.yudian.com.hk
Email: sales@yudian.com.hk
Tel: +852-2770 8785 Fax: +852-2770 8796
V. PARAMETER AND SETTING
Parameter Title Description Range
Field Parameter Table (Press and hold 3 for 2 seconds to access)
HIA
High limit alarm
Alarm on when PV (Process Value) >HIA;
alarm off when PV<HIA-AHY
0～999℃
LoA
Lower limit alarm
Alarm on when PV (Process Value) < LoA;
alarm off when PV > LoA+AHY
0～999℃
HdA
Deviation high
alarm
Alarm on when PV-SV>HdA;
alarm off when PV-SV<HdA-AHY
0～999℃
LdA
Deviation low
alarm
Alarm on when PV-SV<LdA;
alarm off when PV-SV>LdA+AHY
0～999℃
Loc Parameter lock
Loc=0: Allowed to change HIA, LoA, HdA, LdA and SV.
Loc=1: Allowed to read only HIA, LoA, HdA, LdA but to change SV.
Loc=2~3: Allowed to change HIA, LoA, HdA. LdA but read only SV.
Loc=4~255: NOT allowed to change any parameters nor SV.
Loc=808, Set to 808 and press 3 to unlock the System Parameter Table.
0～255
System Parameter Table (Loc=808 to unlock)
AHY
Alarm Hysteresis
Avoid frequent alarm on-off action because of the fluctuation of PV
AHY=2 by default.
0~200
AOP
Alarm output
assignment
HdA &
(x100)
LdA LoA
(x10)
HIA
(x1)
0 ± ± 0 ± 0 ±
1 AU1 ± 1AU1 1 AU1
2 AU2 ± 2AU2 2 AU2
5
A
U1
A
U1
6 AU2 AU1
7 ±
A
U1
8 ±
A
U
2
9
A
U1
A
U
2
Example: AOP=901 refers to HdA assigned to AU1, LdA to AU2,
without LoA and HIA to AU1.
0~922
CrL Control mode
z onF : ON-OFF control. When PV>SV, output stops and heating
stops. When PV<SV-AHY, output resumes.
z AI : AI-PID control. The output time proportion can adjusted by
parameter Ctl
Act Acting method
rE: Reverse acting. Increase in measured variable causes a decrease
in the output, such as heating control.
dr: Direct acting. Increase in measured variable causes an increase in
the output, such as refrigerating control.
rEb: Reverse acting with low limit alarm and deviation low alarm
blocking at the beginning of power on.
drb: Direct acting with high limit alarm and deviation high alarm
blocking at the beginning of power on.
rE , dr ,
rEb, drb
P Proportion band
Proportion band in PID with unit ℃or ℉ but not the percentage of the
input scale.
1~999
I Time of integral Time of integral in PID. No integral effect when I=0 0~999 sec
d
Time of
derivative
Time of derivative in PID with unit 0.1 second. No derivative effect
when d=0
0~999 sec