YK-LED-4

Intelligent large screen digital display instrument

(Instructions for use)

Beijing Yukotaiji Electronics Co., Ltd

I. Overview

This series of products adopts surface packaging modular technology, greatly improving the anti-interference ability of the instrument. It has functions such as display, control, transmission, communication, signal input, etc. It is suitable for displaying and controlling various physical quantity detection signals such as temperature, humidity, pressure, liquid level, instantaneous flow rate, speed, etc., and can perform high-precision linear correction on various nonlinear input signals. It can be widely used in fields such as electricity, metallurgy, chemical industry, petrochemicals, paper printing and dyeing, brewing, tobacco, aerospace bases, etc.

By adopting jumper free technology, the input port is equipped with signal input function. By changing the internal parameters, it is possible to easily switch between multiple input signals (various thermocouples, thermal resistors, remote transmission pressure, mV, standard voltage/current signals). The circuit board has been optimized in design and continuously improved in production process, reducing temperature drift and enhancing anti-interference performance to ensure the stability and reliability of the product during long-term operation. Adopting high brightness LED digital display and high-resolution light column display (proportional display), the display of measurement/control values is clearer and more intuitive.

All output circuits adopt optoelectronic isolation, with strong anti-interference ability. It can be equipped with a serial communication interface and can communicate bidirectionally with various devices with serial interfaces to form a network control system. It has multiple standard external dimensions and can be applied to various measurement and control scenarios. The whole machine adopts a snap in structure, which is very easy to install.

• Scope of Application

This series of intelligent temperature display screens is used in boiler rooms, bathhouses, hot springs, squares, banks, government agencies, etc.

• Features

Input function

Automatic calibration and manual calibration functions

Multiple protection, isolation design, strong anti-interference ability, high reliability

A good software platform with secondary development capabilities to meet special functions

Advanced modular structure, combined with powerful instrument chips, makes it very convenient to combine functions and upgrade systems

2、 Main technical indicators：

Basic error:0.2％FS，14bitA/DConverter (Z large)18bitA/DConverter, specify when ordering).

Input signal: thermocouple: BTheSTheKTheETheJTheTTheWRewait

·Thermal resistance: Pt100TheCu50TheCu53TheCu100TheBA1TheBA2

·Current0～10mA、4～20mAWait (input impedance ≤250Ω)

·Voltage0～5VThe1V～5VThemVWait (input impedance ≥)1MΩ)

·Remote transmission pressure resistor:（0～400(Ω)

Sampling period:0.2S（10~200time/Seconds, user selectable)

Display: Single row LED digital display

Alarm output: The instrument can be equipped with multiple relay outputs, with relay contact capacity of AC220V/or AC220V/1A. Z can carry 16 relays,Upper and lower limit control can be selected, and the control set value and hysteresis value can be freely set within the full range

Transmission output: 4-20mA, 0-10/20mA (load resistance ≤ 250 Ω, indicate if the load is too large)

1~5V, 0-5V, 0-10V (load resistance ≥ 200K Ω).

adopt12Digital D/A chip with isolated output.

Communication output: Isolated communication interface RS485/RS232 baud rate 1200-9600bps

Feed output: DC24V/30mA, DC12V/30mA

Temperature compensation: 0-50 cold end temperature automatic compensation, error: ± 1 ℃

Power supply: Switching power supply 85-265VAC or DC24V or DC12V

Power consumption: 4W

Environmental temperature:（-20～70)℃ (Start up and run at room temperature)30minutes later,Can gradually withstand extreme temperatures)

(0～50)℃ (thermocouple signal input)

Relative humidity: ≤ 85%. No condensation. Avoid use in corrosive and flammable/explosive gases

Panel dimensions: 160mm × 80mm, 96mm × 96mm, 96mm × 48mm

72mm×72mm、48mm×48mm

Our company independently develops and produces various types of instruments with complete functions, such asUsers can choose fast sampling, Z-fast can achieve 200 times/second, high-precision 18 bit A/D acquisition, high-precision 16 bit D/A output, input signal 20 segment curve correction, full 5 or 6 bit display, LCD display, special input signal, multiple relay alarm buzzer output, high-power feeding output, etcPlease specify when placing an order

3、 Instrument size

1、 YK-LED-4 size instrument

Length 34CM, width 22CM, depth 6CM, without pendant.

4、 Operating instructions

(1)The button function is located at the back, and the setting parameters require opening the back cover.

■—When setting the stateSwitch between prompts and set values.When the instrument panel is equipped with a buzzer function, pressing this button during operation can silence the sound.

En- Parameter setting key,When setting the state, it is used to store the new set values of parameters and enter the next one

Set parameters.

▲ - Set value increase key,When setting the stateUsed to increase numerical values.

▼ - Set value increase key, used to decrease the value when in the set state.

(II)Power-On Self-Test

Connect the wiring of the instrument according to the terminal diagram, and only turn on the power after it is correct.After the instrument self-test, if it displays -, it indicates that there is no signal received, the input signal exceeds the range, or the input signal type is set incorrectly. The instrument adopts a human-machine dialogue form to input parameters, and various prompts are used to indicate the data that should be input.

（3） Parameter setting

In working mode, the upper row displays the measured values, while the lower row displays them according to the settings. In the set state, the instrument displays a parameter prompt, press to display the set value. If during the setting process15If the parameter remains unchanged for a second, the instrument will automatically return to operation. Set a parameterAfterwards, press En againPress the key to confirm and enter the next parameter setting state.

The parameter settings are as follows:

(1)pressEnKey, the upper display window appearsLocThe lower display window showsoFFYou must press the ▲ key tooFF改成onOnly after that can the alarm point setting value be modifiedLocset asoFFAt this time, the alarm point setting value cannot be modified and can only be browsed.

(2) J1HA：J1Relay alarm point setting value(whenJ1-Hset asOFFIf so, this option will be closed).

(3)J1HF：J1Relay alarm reset value(whenJ1-Hset asOFFIf so, this option will be closed).

(4) J2HA：J2Relay alarm point setting value(whenJ2-Hset asOFFIf so, this option will be closed).

(5) J2HF: J2 relay alarm reset value (this item is turned off when J2-H is set to OFF).

Set sequentiallyJ3TheJ4The alarm parameters.

After the alarm settings are completed, a password is required to enter the secondary parameter settings.

(6)cd- Password, use ▲ or▼The key will800Set as808,press againEnThe key is used to enter the parameter setting state, and entering other values is invalid to prevent non-technical personnel from misoperation. After setting a parameter, pressEnPress the key to set the next parameter.

(7) Sn—Instrument input signal type.

Note: Input signal selection comparison table(Free input is automatically completed internally, without the need for hardware adjustment, and the mA signal does not require a resistor. )

Parameter prompt	Input signal type	Parameter prompt	Input signal type
tc―K	Ktype	rtd	resistance0-400Ω
tc―S	Stype	bA1	BA1
tc―E	Etype	bA2	BA2
tc―b	Btype	0―50	0―50mV
tc―t	Ttype	0―5V	0―5V
tc―n	Ntype	1―5V	1―5V
tc―J	Jtype	0―20	0―20mA
P100	Pt100	0―10	0―10mA
C100	Cu100	4―20	4―20mA
Cu50	Cu50	Please specify other input signals when ordering

(8) dot- Decimal point position, range0～3, such asdot=2, the display format isXX. XXFor temperature signals such as thermistors and thermocouples, the Z-value is set to1The display resolution is0.1℃, in1000Automatic conversion above degreeresolutionfor1℃.

(9) inPLThe lower limit of the linear input corresponds to the displayed value, which is the lower limit of the instrument range-1999~9999.

(10) inPHThe upper limit of the linear input corresponds to the displayed value, which is the upper limit of the instrument range-1999~9999.

(11)J1-H—J1Relay alarm mode. set as-HH-Indicates an alarm for excessively high measurement values (upper limit alarm), set to-LL-Indicates a measurement value ultra-low alarm (lower limit alarm), set toOFFThis indicates that the alarm is prohibited at this point.(Alarm reference Alarm Description)

Set sequentiallyJ2TheJ3TheJ4The alarm method.

(12) bS- Transmission output mode, selectable1～5V、0～5V、4～20mA、0～10mA、0～20mASeveral ways.

(13) bS-L—-The instrument measurement display value corresponding to * under the transmission output.

(14) bS-HThe instrument measurement display value corresponding to the * on the transmission output. (See the sixth item "Transmission Output" later)

(15) oSEt- Zero point correction coefficientAfter correction, the displayed value is equal to the measured value before correction plus oSEt. The factory value oSEt is 0.0

(16)FSEtThe range of the full-scale correction coefficient is 0.500 to 2.000, and the displayed value after correction is FSEt × (measured value before correction+oSEt). The factory value FSEt is 1.000.

(17)Lb- Digital filtering parameters, set within the range of0～5.LbThe larger, the more stable the measurement value, but the response

It's also slower. Generally, when the measured value is subjected to significant interference, it can gradually increaseLbAdjust the values so that the fluctuation between measured values is less than2～5One word. When conducting metrological calibration of instruments in the laboratory, it is necessary toLbset to0or1To improve response speed.

(18) Addr- Communication address and range of the instrument1～99.

(19) bAUd- Communication baud rate, range1200~9600.

(20)pdWhen the instrument is working, the corresponding unit value is displayed, with 1 corresponding to the MPa indicator light and 2 corresponding to the MPa indicator light℃Indicator light, 3 corresponds to the m indicator light. 0 is not displayed.

Parameter setting completed, display-EndThe instrument automatically enters the running state.

5、 Alarm

This instrument can be equipped with multiple relays, each of which can be set with ultra-high, ultra-low alarm, and prohibition alarm modes, and adoptsThe alarm return method avoids frequent relay actions. When a relay is in an alarm state, the corresponding relay's normally open contact is closed and the corresponding indicator light is on. withJ1Example of alarm point alarm:

If the alarm mode of this alarm point is set to upper limit alarm (i.eJ1-Hset as-HH-）When the measured value is greater thanJ1HAWhen the instrument enters an alarm state, the measured value drops toJ1HAThe instrument does not stop alarming when the value is reached, only when the measured value is belowJ1HFAt this time, the instrument will only release the alarm state. When set as the upper limit alarm, the alarm valueJ1HATo be greater than the alarm reset valueJ1HF.

If the alarm mode of this alarm point is set to lower limit alarm (i.eJ1-Hset as-LL-）When the measured value is less thanJ1HAWhen the instrument enters an alarm state, the measured value rises toJ1HAThe instrument does not stop alarming when the value is reached, only when the measured value is higher thanJ1HFAt this time, the instrument will only release the alarm state. When set as the lower limit alarm, the alarm valueJ1HABe less than the alarm reset valueJ1HF.

6、 Transmission output

The instrument can convert the measured value into a standard signal, and the output form is determined byThe "bS" parameter is determined, and the measurement value transmission range is determined by the "bS-L" and "bS-H" parameters. If measuring temperature signal PT100, it is required to output 4.0mA at 0 ℃ and 20.0mA at 150 ℃, then bS=4-20, bS-L=0.0, bS-H=150.0. So when the instrument displays 75.0 ℃, it outputs 12.0mA.

sevenCommunication instructions

This instrument can be equipped with RS232 and RS485 interfaces for direct communication with computers,RS485Standard Communicationdistance1.5kmMultiple instruments can be attached.RS232Standard Communicationdistance15mOnly one instrument can be attached.RS232Connect the TXD, RXD, and GND of the interface to the second, third, and fifth pins of the computer serial port, respectively. The data format consists of 1 starting bit, 8 data bits, and noneverify﹑1A stop position.

This device adopts the standard Modbus RTU communication protocol and can be connected to almost all configuration software, including Kingview, Power Control, Century Star, etc Fix、InTouchWaiting for domestic configuration software eliminates the hassle of users connecting to the softwareWhen using configuration software, the device to be selected is a PLC with Modicon (* Kang), Modbus RTU address type, integer 16 bit data, starting from 4001 using the Kingview register. Other configuration software may start from 3001.

Parameter code, parameter name, meaning

4x0001 PVMeasurement value (read-only)

4x0002 J1 J1Alarm status (readable and writable)

4x0003 J2 J2Alarm status (readable and writable)

4x0004 J3 J3Alarm status (readable and writable)

4x0005 J4 J4Alarm status (readable and writable)

Example: Read the PV (PV=1000) value of the instrument with address 1

Send data as 01 03 00 00 00 01 84 0A

The returned data is 01 03 02 03 E8 B8 FA (where 03 E8-1000), where 01 is the instrument address, 03 is the function number, 00 and 00 are the register start addresses, 00 and 01 represent reading a number, 84 and 0A are check codes, and B8 FA is the check code in the returned data. If you want to read PV and J1HA data, you can send: 01 03 00 00 02 C4 0B.

8Warranty

If it is a manufacturing quality problem caused by the factory, the instrument will be repaired free of charge from the date of leaving the factory. If the damage is caused by improper storage and use, the repair cost will be charged. The warranty period is twelve months, and the warranty period of 3-5 years must be specified separately.