Yudian AI-218, Operation Manual

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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 Default
Field Parameter Table (Press and hold

for 2 seconds to access)
HIAL High limit alarm
Alarm on when PV (Process Value) >HIA;
alarm off when PV<HIA-AHY
-999
～
+3000
3000
LoAL
Lower limit alarm
Alarm on when PV (Process Value) < LoA;
alarm off when PV > LoA+AHY
-999
HdAL
Deviation high
alarm
Alarm on when PV-SV>HdA;
alarm off when PV-SV<HdA-AHY 3000
LdAL
Deviation low
alarm
Alarm on when PV-SV<LdA;
alarm off when PV-SV>LdA+AHY -999
Loc Parameter lock
Loc=0: Allowed to change field parameters, SV and activate AT
function.
Loc=1: Allowed to change field parameters, SV but no AT activation.
Loc=2: Allowed to change field parameters but not allowed to set SV
nor AT.
Loc=4~255: NOT allowed to change any parameters nor SV.
Loc=808, Set to 808 and press

to unlock the System Parameter Table
.
0
～
255 0
System Parameter Table (Loc=808 to unlock)
AHYS
Alarm Hysteresis
Avoid frequent alarm on-off action because of the fluctuation of PV
AHY=2 by default.
0~200 2
AoP
Alarm output
assignment
Example:
AOP = 0 4 0 3
LdAL HdAL LoAL HIAL
It shows that HIAL is sent to AU1, HdAL to AU2, LoAL and LdAL has no
output.
Alarm
Output to
LdAL
(x 1000)
HdAL
(x100)
LoAL
(x10)
HIAL
(x1)
None 0 0 0 0
AL1 1 1 1 1
AL2 2 2 2 2
AU1 3 3 3 3
AU2 4 4 4 4
0~4444
Depend
on
module
CtrL Control mode

onF : ON-OFF control. When PV>SV, output stops and heating
stops. When PV<SV-AHY, output resumes.

AI : AI-PID control. The output time proportion can adjusted by
parameter Ctl
onoF/API
d
APId
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
rE , dr ,
rEb, drb
rE