Yudian AI-218 - PID Tuning and System Parameters; PID Tuning Parameters; Control and Input Settings; Filtering, Scaling, and Limits

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
at the beginning of power on.
P
Proportion band
Proportion band in PID with unit ℃or ℉ but not the percentage of the
input scale.
1~999
30
I
Time of integral
Time of integral in PID. No integral effect when I=0
0~9999
sec
100
d
Time of derivative
Time of derivative in PID with unit 0.1 second. No derivative effect when
d=0
0~9999
sec
50.0
Ctl
Control period
Smaller value will result in higher control accuracy.
For SSR output, generally 0.5 to 3 seconds.
For Relay output, generally 15 to 40 seconds, because small value will
cause the frequent On-Off of mechanical switch and shorten its service
life. Ctl is recommended to be 1/4 – 1/10 of derivative time. When
control under on-off control, Ctl is used as delay time to restart to
protect the compressor.
0.5-300
sec
CHYS
Control
hysteresis
To avoid frequent relay on-off action, in ON-OFF control mode.
PV > SV, Output turns OFF (Relay opens)
PV < SV-CHY, Output turns ON (Relay closes)
0~200
InP
Input
specification
Thermocouples & RTD
0
K
1
S
2
R
4
E
5
J
7
N
21
Pt100
0～21
0
dPt
Resolution
0 or 0.0 selectable. 0.0 is valid for 0~99.9 ℃ / ℉ display
0/0.0
0.0
Scb
Input shift
Scb is used to make input shift to compensate the error produced by
sensor or input signal.
PV after compensation= PV before compensation + Scb.
-200～
+400
0
FILt
PV input filter
Higher degree of FIL gives more powerful noise filtering.
Large FIL value stabilized the input signal but the system response
speed will be slow. Generally speaking, 1 to 3 will be used.
If great interference exists, FIL can be gradually increase to limit the
momentary fluctuation among 2 to 5 unit.
When the instrument is being metrological verified, FIL should be set to
0 or 1 to minimize the response time.
0～40
1
Fru
Selection of
power frequency
and temperature
scale
50C: 50Hz, ℃
50F: 50Hz, ℉
60C: 60Hz, ℃
60F: 60Hz, ℉
50C
SPL
Lower limit of SV
Minimum value that SV allowed to be.
When SPH=0, the SV range will 0~400℃
-999 ~
+3000
0
SPH
Upper limit of SV
Maximum value that SV allowed to be.
When SPH=400, the SV range will 0~400℃
400