Yudian AI-516 Technical manual

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AI-516 / AI-516P ARTIFICIAL INTELLIGENCE INDUSTRIAL CONTROLLER
(Applicable for accurate controls of Temperature, Pressure, Flow, Level and Humidity etc.)
Operation Instruction（ver.8.2）
Web: www.rievtech.com
Tel: [phone]

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1. SUMMARY...................................................................................................................................................3
1.1 Main Features................................................................................................................................... 3
1.2 Ordering Code Definition................................................................................................................. 3
1.3 Modules..............................................................................................................................................5
1.3.1 Slots of modules.................................................................................................................... 5
1.3.2 Commonly used modules:................................................................................................... 6
1.3.3 Installation and replacement of modules........................................................................... 7
1.3.4 Electric isolation of the modules......................................................................................... 7
1.3.5 Further descriptions about module applications...............................................................7
1.4 TECHNICAL SPECIFICATION....................................................................................................... 8
1.5 Rear Terminal Layout and Wiring...................................................................................................9
2. DISPLAYS AND OPERATIONS............................................................................................................. 13
2.1 Front Panel Description................................................................................................................. 13
2.2 Parameter Setting Flow Chart...................................................................................................... 15
2.3 Operation Description.................................................................................................................... 15
2.3.1 Parameter Setting............................................................................................................... 15
2.3.2 Set Value Setting.................................................................................................................15
2.3.3 Auto Tuning.......................................................................................................................... 17
3.2 The Parameter Table......................................................................................................................18
3.3 Additional Remarks of Special Functions................................................................................... 23
3.3.1 Single-phase phase-shift trigger output...........................................................................23
3.3.2 Alarm blocking at the beginning of power on..................................................................24
3.3.3 Communication function.....................................................................................................24
3.3.4 Temperature re-transmitter / Program generator / Manual current output................. 29
4. Further description for the operation of AI-516P series instrument.................................................. 29
4.1 Concepts and functions Program.................................................................................................30
5. Programming and operation (For AI-516P only).................................................................................. 31
5.1 Ramp Mode(PAF : B=0)................................................................................................................ 31
5.2 Soak mode(PAF : B=1)..................................................................................................................32

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1. SUMMARY
1.1 Main Features
●Use digital calibration technology for input measurement with input measurement accuracy
F.S.0.3%, Support
standard thermocouples and RTDs, maximum resolution is 0.01℃
●Use advanced artificial intelligent control algorithm, no overshoot and with the function of auto
tuning (AT) and
self-adaptation.
●Use advanced modular structure, conveniently providing plentiful output options, able to satisfy
the requirements
of various applications, make quick delivery and convenience the maintenance of the instrument.
●Friendly and customized operating interface leads to quick and easy to operate. Parameter can
be promoted to
immediate operator access in Field Parameter Table or password protected in Full Parameter
Table.
●With worldwide power supply of 100-240VAC or 24VDC and various installation dimensions for
users to choose.
●ISO9001,CE and UL 61010-1 certified, achieving world class level of quality, anti-interference
ability and safety.
POINTS FOR ATTENTION
●This manual is AI-516/AI-516P ARTIFICIAL INTELLIGENCE INDUSTRIAL CONTROLLER
Version 8.2. Certain
functions in this manual are probably not applicable for the instrument of other version. When the
power is on,
instrument model and software version will be displayed. User should pay attention to the
difference between different versions when using the instrument. Please read this manual carefully
in order to use the instrument
correctly and make it to its full use.
●Please correctly set parameters according to input / output type and function. Only correctly
wired instruments
with parameters correctly set can be put into use.
1.2 Ordering Code Definition
Advanced modularized hardware design is utilized for AI series instruments. There are maximum
five module slots:
multi-function input/output (MIO), main output (OUTP), alarm (ALM), auxiliary output (AUX) and
communication
(COMM). The modules can be purchased together or individual, and can be assembled freely. The
input type can be
set to thermocouple, RTD, or linear current/voltage.

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The ordering code of AI-516/AI-516P (V8.2) series instrument is made up of 9 parts. For example:
AI－516 A N X3 L3 N S4 －24VDC – (F2)
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨
It shows that the model of this instrument is AI-516, front panel dimension is A size(96×96mm), no
module is installed in MIO slot, X3 linear current output module is installed in OUTP (main output),
ALM (alarm) is L3 (dual relay contact output module), no module is installed in AUX (auxiliary
output), S4 (RS485 communication interface module) is installed at COMM , and the power supply
of the instrument is 24VDC, an extended input type (F2 radiation type
pyrometer) is available
The following is the meanings of the 9 parts:
①Shows the model of the instrument
AI-516 Economical type instrument with measurement accuracy 0.3%F.S. It adopts
artificial intelligent control technology, and has the functions of control, alarm, retransmission and
communication.
AI-516P Base on AI-516 added 30 segments programmable functions.
②Shows the front panel dimension
A(A2) Front panel 96×96mm(width×height), cut out 92×92mm, depth behind mounting
surface 100mm.
A2 has a light bar with 25 segments and 4 levels of luminosity.
BFront panel 160×80mm(width×height), cut out 152×76mm, depth behind mounting surface
100mm.
C(C3) Front panel 80×160mm(width×height), cut out 76×152mm, depth behind mounting
surface 100mm.
C3 has an additional light bar with 50 segments and 2 levels of luminosity.
DFront panel 72×72mm(width×height), cut out 68×68mm, depth behind mounting surface
95mm
D2 Front panel 48×48mm(width×height), cut out 45×45mm, depth behind mounting surface
95mm
D6 Front panel 48×48mm(width×height), cut out 45×45mm, depth behind mounting surface
95mm
E(E2) Front panel 48×96mm(width×height), cut out 45×92mm, depth behind mounting surface
100mm
E2 has an additional light bar with 25 segments and 4 levels of luminosity.
FFront panel 96×48mm(width×height), cut out 92×45mm, depth behind mounting surface
100mm
E5 Rail mounted 48×96×110mm(width×height×depth), installed on DIN trail and programmed
by external display E8
③Shows the module type of multiple functions I/O (MIO). Selectable modules are I2, I4, K3

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and V, etc. N means no module been installed.
④Shows the module type of main output (OUTP). Selectable modules are L1, L2, L4, W1,
W2, G, K1, K3, K5, K6, X3, X5 etc.
⑤Shows the module type of alarm (ALM). Selectable modules are L0, L2, L3,L4, W1, W2, G,
etc.
⑥Shows the module type of auxiliary output (AUX). Selectable modules are L0, L2, L3, L4,
W1, W2, G, K1, X3,X5, etc.
⑦Shows the module type of communication (COMM). Selectable modules are S, S4, V, etc.
⑧Shows the power supply of the instrument. If left blank, the power of the instrument is
100~240VAC. Added "24VDC" means the power supply of 20~32V DC or AC power
⑨Shows the optional extended graduation spec (If none, leave it blank). AI-516 series
instruments support many input types including popular thermocouples, RTDs, linear
voltage, current and resistance inputs. If needed, an additional specification not mentioned
in input type selection (InP) table can be extended.
Note 1: The instrument applies the technology of automatic zero and digital calibration, and is free
of maintenance. If the error exceeds certain range, generally, cleaning and drying the inside of the
instrument can fix it. If not, send the instrument back to the factory to examine and repair.
1.3 Modules
1.3.1 Slots of modules
AI-516/516P series instruments have five slots for modules to be installed (D dimension
instruments have 3slots: OUTP, AUX and COMM/AL1; D2/D6 dimension instruments have 2 slots:
OUTP and COMM/AUX). By installing different modules, the controller can meet the requirements
of different functions and output types.
●Multiple function Input / Output (MIO):
Can input signal from 2-wire transmitter or 4-20mA signal by installing I4 (current input) module and
I4 module can provide 24VDC to transmitter. If a I2 (on-off signal input) module is installed, the
instrument can switch between set points SV1 and SV2 by an external switch. Cooperating with
OUTP and installing a K3 module can realize three-phase thyristor zero cross triggering output.
●Main output (OUTP):
Commonly used as control output such as on-off control, standard PID control, and AI PID control.
It can be used as retransmission output of process value (PV) or set point (SV). Installing L1 or L4
modular can realize relay contact output; installing X3 or X5 module can realize
0-20mA/4-20mA/0-10mA linear current output; installing G module can realize SSR voltage output;

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installing W1 or W2 module can implement TRIAC no contact switch output.
●Alarm (ALM): Support 1 normally open + normally close relay output (AL1) by installing L0 or
L2 module or 2 normally open relay outputs (AL1+AL2) by installing L3 module.
●Auxiliary output (AUX): Support 1 normally open + normally close relay output (AL1) by
installing L0 or L2 module or 2 normally open relay outputs (AL1+AL2) by installing L3 module. or
be used for communicating with computer by installing R module (RS232C interface).
●Communication Interface (COMM): Module S or S4 can be installed in for communicating with
computer (RS485 communication interface), and it can also be used as power supply for external
sensor when equipped with a voltage output module (except for front panel D2 size).
1.3.2 Commonly used modules:
NNo module installed (or null)
L0 Normally open + normally close relay output module (large volume, capacity: 30VDC/2A,
250VAC/2A,suitable for alarm)
L1 Normally open + normally close relay output module (large volume, capacity: 30VDC/2A,
250VAC/2A)
L2 Normally open + normally close relay output module (small volume, capacity: 30VDC/1A,
250VAC/1A,suitable for alarm)
L3 Dual normally open relay output module (Capacity: 30VDC/2A, 250VAC/2A)
L4 Large capacity normally open relay output module (large volume, Capacity: 30VDC/2A,
250VAC/2A) W1/W2 TRIAC no contact normally open (W2 is normally close) discrete
output module (Capacity:100-240VAC/0.2A)
GSSR voltage output module (DC12V/30mA)
G5 Dual SSR voltage driver (DC12V/30mA)
K1 Single-phase thyristor zero crossing trigger output module (can trigger one loop of a
TRIAC or a pair of inverse parallel SCR with current of 5-500A)
K3 Three-phase thyristor zero crossing trigger output module (can trigger 3-phase circuit;
each loop can trigger TRIAC or a pair of inverse parallel SCR with current of 5-500A)
K5/K6 Single-phase 220VAC/380VAC thyristor phase-shift trigger output module (can trigger one
loop of TRIAC or a pair of inverse parallel SCR with current of 5-500A), only 50Hz power
X3/X5 Linear current output module (continuous 0-22mA output, selectable in the range of
0-10mA, 4-20mA etc.).
X5 is equipped with photoelectric isolated power supply.
S/S4 RS485 communication interface module. S4 is equipped with photoelectric isolated power
supply.
RRS232 communication interface module.
I2 Switch / frequency signal input interface for inputting external switch or frequency signal,
has a 12VDC power supply for external transducer.
I4 4-20mA/0-20mA analogue input interface, has a 24VDC/24mA power supply for a
transmitter.
V24/V12/V10/U5
Isolated 24V/12V/10V/5V DC voltage output with maximum current of 50mA, can supply power for
transmitter.

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1.3.3 Installation and replacement of modules
Before the instrument delivery, module installation is done on request, with corresponding
parameter set correctly.
Users can replace or install modules by themselves when needed. When replacing a module, you
should pull the controller out of the housing at first, insert a small flat-tip screwdriver into the
opening between the original module and the slot on motherboard to remove the old module, and
then install a new module. Changing module type needs to modify the corresponding parameters.
1.3.4 Electric isolation of the modules
There are a group of 24V and a group 12V power supply built in the instrument and isolated to the
main circuit. The 24V power commonly supplies voltage output module, such as V24/V12/V10/V5,
I2 and I4. The 12V power is commonly supplies output or communication module. Generally, the
relay contact output and TRIAC no contact discrete output are self insulated from the other circuit,
no matter whether other modules are installed or not. SSR output voltage does not need to be
insulated from input circuit, because SSR itself has isolation function. Therefore, only the electric
isolation between the communication interface and the current output should be considered. Those
modules, for example, S (RS485 communication interface), R (RS232 communication interface)
and X3 (linear current output), all need the 12V power supply. If more than one of the above
modules are installed, in order to be electric isolated, only one of them can be module without
electric isolation, the other modules should be S4 or X5, which has its own isolated power supply.
For example, if an X3 module is installed in OUTP (main output) slot, for isolate purpose,
COMM slot should be install S4 or X5.
1.3.5 Further descriptions about module applications
Voltage output module: The voltage output modules like V24, V12, \/10 or V5 are often used
for supplying power for external transducer or feedback resistance of transmitter. These modules
can be installed in any slot. To standardize the wiring, it is recommended to be installed in the first
idle slot in the order of MIO, AUX,and COMM.
No contact switch module: W1 and W2 are new types of no contact switch module which
apply the advanced technology of “burn proof”and zero crossing conduction. It can replace the
relay contact switch. Compared to the relay contact output module, W1 and W2 have longer life
and lower interference. They can be largely lower the interference spark of the equipment, and
greatly improve the stability and reliability of the system. Protection elements are series wound to
the output terminals, so it can control continuous current up to 0.2A with maximum allowed
instantaneous current 2A. Since the driver element is TRIAC, it is suitable for controlling
100-240VAC (not for DC power) with contactor which current below 80A. For the current larger than
80A, an intermediate relay is needed.

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Relay switch module: The relay modules are widely used in industrial control. However, they are
the only modules with life time limit and volume limit and have much electromagnetic interference. It
is important to choose a suitable relay module. To control equipments with 100~220VAC supply,
such as contactor and electromagnetic valve, W1 module is recommended. To control DC or AC
above 50VAC, users can only use relay module. L2 module is small, and both its normal open and
normal close terminals have the function of spark absorption, but the capacity is small. It is suitable
for alarm output. L1 and L3 have bigger volume and capacity.
In the 48mm dimension instrument (for example, D6, E, F and E5), only one of L1or L3 can be
installed. L3 has dual output, can be used to support two loops of alarm, for example, AL1+AL2. If
you don’t like mechanical switch, you can choose G5 (dual SSR voltage driver) and connect with
external SSR instead.
1.4 TECHNICAL SPECIFICATION
Input type: (Either of below specifications can be used selectively in the one instrument)
Thermocouple: K, S, R, E, J, N, T, B, WRe3-WRe25, WRe5-WRe26.
Resistance temperature detector: Cu50, Pt100
Linear voltage: 0～5V, 1～5V, 0～1V, 0～100mV, 0～20mV, 0~500mV etc.
Linear current (external precise shunt resist needed): 0～10mA,0～20mA, 4～20mA, etc.
Extended input (install I4 module in MIO) : 0～20mA, 4～20mA or two line transmitter.
Optional: apart from the above-mentioned Input type, an additional type can be provided upon
request.
(Graduation index is needed)
Instrument Input range
K(-50～1300℃), S(-50～1700℃), R(-50～1700℃), E(0～800℃), J(0～1000℃), N(0～1300℃),
T(-200~+350℃),
B(200~1800℃)
Cu50(-50～+150℃), Pt100(-200～+600℃)
Linear Input: -9990～30000 defined by user
Measurement accuracy : 0.3%FS ±1 measurement unit
Resolution : 0.1℃for K, E, T, N, J, Cu50, Pt100; 1℃for S,R
Temperature shift : ≤0.015%FS /℃(typical value is 80ppm/℃)
Sampling period : read A/D converter 8 times per second
Response time : ≤0.5s ( when digital filter parameter FILt=0)
Alarm function : High limit, low limit, deviation high limit and deviation low limit; providing the
function of alarm blocking at the beginning of power on.

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Control period : 0.24～300.0 seconds selectable, and it should be integer times of 0.5 second.
Control mode:
On-off control mode (dead band adjustable)
Standard PID with auto tuning
AI PID with auto tuning, adopting artificial intelligence algorithm.
Output mode (modularized)
Relay output (NO+NC): 250VAC/2A, 30VDC/2A, 250VAC/1A and 30VDC/1A
TRIAC no contact discrete output (NO or NC): 100 ～240VAC/0.2A (continuous), 2A (20mS
instantaneous, repeat period≥5s)
SSR Voltage output: 12VDC/30mA (used to drive SSR).
Thyristor zero crossing trigger output: Can trigger TRIAC of 5 ～500A, a pair of inverse
paralleled SCRs or SCR power module.
Linear current output: 0～20mA, 4～20mA can scaling by user. (Output voltage : X3≥10.5V; X5
≥7V maximum load resistor 500ohm, output precision 0.2%FS)
Electromagnetic compatibility (EMC): ±4KV/5KHz according to IEC61000-4-4; 4KV
according toIEC61000-4-5.
Isolation withstanding voltage : Between power, relay contact or signal terminals ≥
2300VDC; between isolated electroweak terminals ≥600V
Power supply : 100～240VAC, -15%, +10% / 50-60Hz; 120～240VDC; or 24VDC/AC, -15%,
+10%.
Power consumption: ≤5W
Operating Ambient : Temperature -10～60℃; humidity ≤90%RH
Front panel dimension: 96×96mm, 160×80mm, 80×160mm, 48×96mm, 96×48mm, 48×
48mm, 72×72mm
Panel cutout dimension: 92×92mm, 152×76mm, 76×152mm, 45×92mm, 92×45mm, 45
×45mm, 68×68mm
Depth behind mounting surface: ≤100mm
1.5 Rear Terminal Layout and Wiring
Wiring graph of A B C E F dimension instruments

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Note 1:
For linear voltage input, if the range is below 500mV,connect to terminals 19 and 18. 0～5V or 1～
5V signal canbe inputted from terminals 17 and 18.
Note 2:
4～20mA linear current signal can change to 1 ～5V voltage signal by connecting a 250 ohm
resistor, and then be inputted from terminals 17 and 18. If I4 module is installed in MIO slot, 4～
20mA signal can be inputted from terminals 14+ and 15-, and 2-wire transmitter can be inputted
from terminals 16+ and 14-.
Note 3: The compensation wires for different kinds of thermocouple are different, and should be
directly connect to the terminals. When the internal auto compensation mode is used, connecting
the common wire between the compensation wire and the terminals will cause measurement error.
Note 4:
When main output selected linear current or SSR voltage, output form terminal 13+, 11-,
Wiring graph of D dimension instruments (72×72mm)
Note 1:
Linear voltage signal of range below 500mV should be inputted from terminals 13 and 12, and
signal of 0～5V and 1～5V should be inputted from terminals 11 and 12.
Note 2:

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4～20mA linear current signal can be converted to 1～5V voltage signal by connecting a 250 ohm
resistor and inputted from terminals 11 and 12.
Note 3:
S or S4 module can be installed in COMM slot for communication. If relay, TRIAC no contact switch,
or SSR drive voltage output module is installed in COMM, it can be used as alarm output. If I2
module is installed in COMM and parameter “bAud”is set to 1, SV1 and SV2 can be
switching by connecting a switch between terminals 3 and 4.
Wiring graph of instruments with D2 dimension as below:
Note 1:
D2 dimension instruments don’t support 0～5V or 1～5V linear voltage input.
However, 0 ～5V or 1 ～5V signal can be converted to 0～500mV or 100～500mV by
connecting external precise resistors, 4 ～20mA can be converted to 100～500mV by
connecting a 25ohm resistor, then be inputted from terminals 9 and 8.
Note 2:
For COMM/AUX slot, if S or S4 communication module is installed, it can be used for
communication; if L2 module is installed in, parameter set bAud = 0, it can be used for AU1 or AU2
alarm output; if set parameter bAud = 2, it can be used for AU1 or AL1 alarm output. If L1, L2, L4,
G, K1, W1 or W2 is installed, it can be the auxiliary output in bidirectional (heating/refrigerating)
control (Auxiliary output doesn’ t support analog current output); if I2 is installed and bAud = 1, then
it can input on-off signal to switch SP1 and SP2 (AI-516) or switching the program status RUN /
Stop (AI-516P) by connecting a switch between terminals number 3 and 5.

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Wiring graph of instruments with D5 dimension as below:
Note:
D5 dimension din rail mounting instruments have one channel alarming and communication
function, main output slot can install G X3/X5 K1 K5 L1 modules.

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Note 1: According to the voltage and current of load, choose a suitable varistor to protect the
thyristor.
A resistor-capacitor circuit (RC circuit) is needed for inductance load or phase-shift trigger output.
Note 2: SCR power module is recommended. A power module includes two SCRs, is similar to the
above dashed
square.
Note 3: K5 and K6 TRAIC trigger module only support 220～380VAC and 50Hz power.
2. DISPLAYS AND OPERATIONS
2.1 Front Panel Description
①Upper display window: Displays PV, parameter code, etc.
②Lower display window: Displays SV, parameter value, oralarm message
③Setup key: For accessing parameter table and conforming parameter modification.
④Data shift key, start auto tuning
⑤Data decrease key, and also run switch
⑥Data increase key, and also stop key
⑦LED indicator: “MAN”led is non-applicable for AI-516 series. “RUN”led on, it mean AI-516P
running program. MIO, OP1, OP2, AL1, AL2, AU1 and AU2 indicate I/O operation of the
corresponding module. For example, when COMM led is lighting means that the instrument is
communicating with computer.

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Basic display status :
When power on, the upper display window of the instrument shows the process value (PV), and the
lower window shows the set point (SV). This status is called basic display status. Symbol
description was shown as following table:
Note 1: The alarm message can turn off by setting parameter AdIS to oFF.
Note 2: When occur orAL alarm, instrument will cut the output in short period.
Note 3: For AI-516P, “StoP” ,” HoLd”and “rdy”which mean the status in stop, hold and ready.

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2.2 Parameter Setting Flow Chart
2.3 Operation Description
2.3.1 Parameter Setting
In basic display status, press and hold for about 2 seconds can access Field Parameter Table.
Press can go to the next parameter; press 、or can modify a parameter.
Press and hold can return to the previous parameter. Press (don't release) and then
press key simultaneously can escape from the parameter table. The instrument will escape
auomatically from the parameter table if no key is pressed within 25 seconds, and the change of the
last parameter will not be saved.
In Field Parameter Table, till the last field parameter Loc appears. Setting Loc=808 and then
press can access System Parameter Table.
2.3.2 Set Value Setting
In basal display status, if the parameter lock “Loc”isn't locked, we can set setpoint (SV) by
pressing first、

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then can press , or to adjust value. Press key to decrease the value, key
to increase the value, and key to move to the digit expected to modify. Keep pressing
or , the speed of decreasing or inscreasing value get quick. The range of setpoint is
between the parameter SPL and SPH. The default range is 0~400.
Program segment setting:
Press the key once and release in the display status, the instrument will be in the setup
program status.
set point of the current program StEP will be displayed.
Pressing 、or can modify the value.
Pressing can go to next parameter. The program parameters will be displayed in the
sequence
setpoint1, time1, setpoint2, time2.
Pressing and holding for about 2 seconds will return to the previous parameter. Program step
can modify
anytime even the program still in running.
Run / Hold only (for AI-516P)
In basic display status, if the program is in stoP status (
“StoP”is alternately displayed on the lower
window),and hold the key for about 2 seconds until the lower display window displays the
"Run" symbol,instrument then will start the program.
If parameter “PAF”set F=1, user can hold the key for about 2 seconds, instrument will
changes tostatus and lower display window displays the "HoLd" symbol. If parameter “PAF”set
F=0, “Hold”status onlyactivate by parameter setting (Srun).
At Hold status, the program is still executing, and the process value is controlled same as setpoint,
but thestop working, and the running time and setpoint remains. At Hold status, press and hold the
key for aboutseconds until the lower display window displays the "Run" symbol, the
instrument will back to run program
Stop
Press and hold the key for about 2 seconds in the basic display status, until the lower
display window displays the "stoP" symbol, means the stoP operation is executed now, when
program stopped, timer will be reset and stop. This operation forces the instrument to stop running,
meanwhile, the StEP number will reset to 1, and control output is also stopped

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2.3.3 Auto Tuning
When AI control method is chosen (CtrL=APId / nPId), the PID parameters can be obtained by
running auto-tuning.
In basal display status, press for 2 seconds, the “At”parameter will appear.Press to
change the value of “At”from “oFF”to “on”,then press to active the auto-tuning
process.During auto tuning,the instrument executes on-off control.After 2-3 times of on-off
action,the instrument will obtain the optimal control parameter
value.
If you want to escape from auto tuning status, press and hold the key for about 2 seconds until the
"At" parameter appear again. Change “At”from “on”to “oFF”, press to confirm, then the
auto tuning processwill be cancelled. (P.S. If parameter “SPr ”activate and the heating was
running, then will stop the “At”until completed the heat up process. ) If the controller was applied
on heat/cooling duel output system, PID parameter need separate two group to process auto tuning.
When the controller was cooling control from AUX, this time can enable auto tuning to obtain P2, I2,
d2.
Note 1:
At AI-516P, when auto tuning was running, the program timer will stop until tuning finish.
Note 2:
If the setpoint is different, the parameters obtained from auto-tuning are possible different. So you’
d better set setpoint to an often-used value or middle value first, and then start auto-tuning. For the
ovens with good heat preservation, the setpoint can be set at the highest applicable temperature.
Depending on the system, the auto-tuning time can be from several seconds to several hours.
Note 3:
Parameter CHYS (on-off differential, control hysteresis) has influence on the accuracy of
auto-tuning. Generally, smaller value of CHYS, will get higher precision of auto tuning result. Too
large value of CHYS, will made the controller out of control, so, CHYS is recommended to be 2.0.
Note 4:
AI series instrument has the function of self-adaptation. It is able to learn the process while working.
He control effect at the first run after auto tuning is probably not perfect, but excellent control result
will be obtained after a period of time because of self-adaptation.
3. PARAMETERS AND SETTINGS
3.1 Parameter Lock (Loc) and Field Parameters
Parameter was protected by LOC (Parameter LOCK) to prevent setting error. The function was
shown as below:
√: allow to modify data or execute
X : not allow to modify data or execute
Run, Stop, Hold. and Program Time & Temp. function just for AI-516P only

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Loc 808 is the master password, this valve can be change by parameter PASd. Please set PASd
cautiously, if the password lost, you can’t access the parameter table again.
1 to 8 field parameters can be defined by parameters EP1 to EP8. If the number of the field
parameters is less than 8, the first idle EP parameter should be set to “nonE” . The initial values of
EPs and Loc are EP1=HIAL, EP2=LoAL, EP3=HdAL, EP4=LdAL, EP5=nonE, EP6=nonE,
EP7=nonE, EP8=nonE and Loc=0.
You can redefine field parameters and Loc to change operation style. For example, you can
execute auto tuning from field parameter instead of by pressing in basic display status, and
only take HIAL and HdAL as field parameter.
The EP paramters and Loc should be set as follows: EP1=HIAL, EP2=HdAL, EP3=At, EP4=nonE,
Loc=1
3.2 The Parameter Table
The parameters can be divided to 8 groups including alarm, control, input, output, communication,
system, setpoint and field parameter definition. They are listed as below in sequence:

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