B ELT W EIGHER I NSTRUMENT - T ECHNICAL I NFORMATION
技术信息简介
产品特点….FEATURES
•
F LOWRATE MEASUREMENT FOR BELT WEIGHERS
•
可移动 P-Module 芯片卡
R EMOVABLE P-M ODULE HOLDS CALIBRATION SETTINGS
•
F LOWRATE O UTPUT
•
可计量总累计量
M ATERIAL T OTALISER
•
4 开关量输入
D IGITAL INPUTS
•
4 开关量输出
D IGITAL OUTPUTS
•
使用 Modbus 实现数据交换（独立的
RS232
及 RS485 接口）
M ODBUS COMMUNICATIONS (INDEPENDENT RS232 AND RS485 PORTS )
•
系统软件可升级
F IELD SOFTWARE UPGRADES
• 电源 12-24 Vdc 12-24V DC POWER SUPPLY
•
系统精度优于 0.01%
O VERALL ACCURACY BETTER THAN 0.01%
变送器外壳类型选择….HOUSING
OPTIONS
•
MTxG 密封挂壁式 (IP67)
F IELD HOUSIN
G , R AIL MOUNT
• MT6x 规格 170 x 80 x 70mm
可选件….OPTIONS
• MO2 4-20mA 或 0-10V 输入及 4-20mA 输出（仅限 MT6x 和 MT8x ）
MO2 4-20M A OR 0-10V INPUT AND 4-20M A OUTPUT
•
±5V 电击火花保护
±5V EXCITATION FOR SAFETY BARRIER APPLICATIONS
应用 A PPLICATION
ModWeigh MW95 皮带秤系统是用于计量皮带物料流量的称量仪器。
A M OD W EIGH MW95
B ELT W EIGHER S YSTEM IS USED TO MEASURE THE FLOWRATE OF MATERIAL CARRIED BY A BELT CONVEYOR .
本仪器通过称量皮带负重及皮带速度来计量物料流量。
I T MEASURES THE BELT LOADING AND BELT SPEED AND CALCULATES THE MATERIAL FLOWRATE .
MW99 称重显示器 MW99 W EIGHT I NDICATOR
ModWeigh MW99d4 型称重显示器应用于标定系统及为系统提供准确的称量数据显示。本称重显示器采用图形显示，结合快捷设置菜单，简单易用。
A M OD W EIGH MW99D 4 F LOWRATE I NDICATOR IS USED TO CALIBRATE THE SYSTEM AND PROVIDE A STATUS DISPLAY OF THE OPERATING SYSTEM . I T HAS A GRAPHICS DISPLAY WITH EASY TO USE MENU SELECTION OF SETTINGS .
EMC INDUSTRIAL GROUP LTD 功能特点 Features
功能特点F EATURES
基本B ASIC
计量单位及数据采集率U NITS &R ESOLUTION
用户可根据需要在列表中选择公制或英制变量（重量等）单位。可调的变量单位数据采集率，例如，
100kg 可显示为 0.2kg 的增量。
T HE UNITS FOR EACH VARIABLE TYPE (WEIGHT ETC.) CAN BE SELECTED FROM A LIST OF METRIC AND IMPERIAL UNITS.T HE RESOLUTION OF EACH VARIABLE TYPE CAN BE ADJUSTED, THIS ALTERS
THE COUNT BY E.G 100KG DISPLAYED IN 0.2KG INCREMENTS.
OIML （国际合法计量组织）设计OIML D ESIGN
本设备按 OIML 认证标准设计制造。
T HE INSTRUMENT IS DESIGNED TO OIML STANDARDS.
输入I NPUTS
开关量输入 IN1..IN8D IGITAL I NPUTS IN1..IN8
开关量输入可进行编程并匹配一系列功能包括“校零”，“打印”等。 T HE DIGITAL INPUTS ARE PROGRAMMABLE TO A RANGE OF FUNCTION INCLUDING ‘ACQUI
RE ZERO’,‘PRINT’ ETC.
直接及动态标定D IRECT &D YNAMIC C ALIBRATION
直接标定是通过使用称重传感器额定量程及灵敏度来标定称重信号。动态标定允许皮带在运行条件下对已
知称量段重量(kg)或皮带载荷(kg/m)进行称重标定。此功能特别适用于使用链码标定。
D IRECT CALIBRATION USES TH
E LOADCELL CAPACITY AND LOADCELL SENSITIVITY TO CALIBRATE THE WEIGHT SIGNAL.D YNAMIC CALIBRATION ALLOWS CALIBRATION O
F THE WEIGHT WHILE THE
BELT IS MOVING KNOWING THE PLATFORM WEIGHT (KG) OR THE BELT LOADING (KG/M).T HIS IS USEFUL WHEN CALIBRATING IS DONE USING CHAINS.
称重传感器角落调整C ORNER A DJUSTMENT
此功能可在多达四个称重传感器间进行激励电压调整，以修正不同称重传感器间的灵敏度差异。
T HE EXCITATION VOLTAGE CAN BE ADJUSTED ON UP TO FOUR LOADCELLS, ALLOWING DIFFERENCES IN LOADCELL SENSITIVITIES TO BE CORRECTED.
测速传感器输入T ACHO I NPUT
测速传感器用于测量皮带速度及运行状况，其基本标定是通过设置转速计常数来完成的。
T HE TACHO INPUT IS USED TO MEASURE THE BELT SPEED AND BELT TRAVEL.B ASIC CALIBRATION IS DONE USING A TACHO CONSTANT SETTING.
系统可通过测量一段已知长度皮带在经过某一点所发出的脉冲信号数量对转速计进行标定。其它皮带长度
也可以同样方法进行测量。
T HE SYSTEM CAN BE USED TO CALIBRATE THE TACHO BY MEASURING THE NUMBER OF PULSES AS A KNOWN LENGTH OF BELT PASSES A POINT.O THER BELT LENGTHS CAN BE MEASURED IN A
SIMILAR MANNER.
校零/去皮Z EROING
空载的皮带重量在经过一个完整的皮带周期后被平均，所得数值被纪录为动态零值。
T HE WEIGHT OF THE UNLOADED BELT IS AVERAGED OVER ONE COMPLETE BELT REVOLUTION AND THE RESULTING VALUE IS STORED AS THE DYNAMIC ZERO.
校零功能可以半自动化形式进行。控制仪可通过一项输出信号发出指令，停止物料输送；待皮带上无物料
，系统即开始执行零值平均。当校零完成后，系统重新进料，并等待物料输送重量达到正常值，即重新恢
复正常计控状态。
T HE ZEROING CAN BE SEMI-AUTOMATED BY USING AN OUTPUT SIGNAL TO STOP THE MATERIAL FEED ONTO THE BELT, WAITING UNTIL THE BELT IS EMPTY, PERFORMING THE ZERO AVERAGING,
RESTARTING THE FEED AND WAITING UNTIL MATERIAL HAS REACHED THE WEIGH POINT BEFORE RETURNING TO FLOW CONTROL.
零点跟踪功能能够连续监视秤台重量，任何在称量段上小的物料堆积或偏差重量都会被自动清零。此功能
确保了当皮带上无物料时，系统纪录为零流量。
A UTO ZEROING CONTINUOUSLY MONITORS THE PLATFORM WEIGHT.A NY SMALL DRIFT IN THE WEIGHT MEASUREMENT OR MATERIAL BUILD UP ON THE WEIGH PLATFORM IS AUTOMATICALLY ZEROED
OUT.T HIS ENSURES THAT WITH NO PRODUCT ON THE BELT, A ZERO FLOWRATE IS RECORDED.
信号过滤S IGNAL F ILTERING
重量信号过滤功能可以在减小机床震动及仪器反应速度间进行调整以取得最佳折衷点。
F ILTERIN
G FOR THE WEIGHT CAN BE ADJUSTED TO GET THE OPTIMUM COMPROMISE BETWEEN REDUCTION OF PLANT VIBRATION AND RESPONSE SPEED.
内部信号I NTERNAL S IGNALS
极限值L IMITS
最高及最低极限值均可进行设置，编程及匹配操作其它内部信号。
T HE HIGH AND LOW LIMITS HAVE ADJUSTABLE SETPOINTS WHICH MAY BE PROGRAMMED TO OPERATE ON ANY INTERNAL SIGNAL.
批量模式B ATCHING
本系统可用于处理物料批量，当批量重量经过称重平台即停止传送带输送。此外，批量校正功能能够通过
估计重量的方法，在目标重量达到前停止传送带以确保得到准确的批量。
T HE SYSTEM CAN BE USED TO BATCH OUT A DESIRED WEIGHT BY STOPPING THE FEEDE
R WHEN THE BATCH WEIGHT HAS BEEN TOTALISED.A PRE-ACT IS AVAILABLE TO COMPENSATE FOR OVERRUN.
事件收集E VENT C OLLECTION
系统可收集处理事件并提供给外部设备（PLC 或其它）。
P ROCESS EVENTS ARE COLLECTED FOR OPERATION WITH EXTERNAL EQUIPMENT (PLC S ETC.)
记忆存储M EMORY S TORAGE
此功能可对一组设定值进行存储，并从存储中恢复设定值。此功能可存储不同的设定值用于不同的用途，
系统可提供 20 个存储单元，每个存储单元可存储多达 4 个设定值。
A LLOWS A GROUP OF SETTINGS TO BE STORED OR RECALLED FROM MEMORY.T HIS CAN BE USED FOR EXAMPLE TO STORE SETTINGS FOR DIFFERENT PRODUCTS.T HERE ARE 20 MEMORY LOCATIONS
WITH UP TO 4 SETTINGS IN EACH.
物料累计量M ATERIAL T OTAL
系统处理器连同累计量计数器共同计算经过系统的物料总量。此累计量可清零，累计量脉冲输出可驱动外
接计数器。累计量计数具备低流量切断功能，确保了过低流量不会导致错误计数，累计总重量数据保留不
受断电影响。
T HE PROCESSOR INCORPORATES A TOTALISER WHICH TOTALISES THE WEIGHT OF MATERIAL THROUGH THE SYSTEM.T HE TOTALISER CAN BE RESET TO ZERO.A PULSE OUTPUT IS AVAILABLE TO
OPERATE EXTERNAL COUNTERS.A LOW FLOW CUTOUT ENSURES THAT LOW FLOWS DO NOT CAUSE FALSE COUNTS.T HE TOTAL IS RETAINED AFTER A POWER FAILURE.
EMC INDUSTRIAL GROUP LTD ModWeigh 输入/输出累计量计数器位数可设置为 5，6，7 或 8 位。
T HE TOTALISER CAN BE SET TO OPERATE WITH 5,6,7 OR 8 DIGITS.
输出O UTPUTS
物料流量M ATERIAL F LOWRATE
模拟输出流量信号可连接至其它设备。
A N ANALOG FLOWRATE OUTPUT SIGNAL IS AVAILABLE FOR CONNECTION TO OTHER INSTRUMENTS.
模拟信号输入/输出缩放比例A NALOG I/O S CALING
模拟输出信号可在 0 至 20mA 范围内进行调整。当使用 0 至 20mA 范围时，为达到相对 0 值，输出信号
可略为负毫安。电压输出信号可通过在输出上连接电阻器获得。
T HE ANALOG OUTPUT RANGE CAN BE ADJUSTED OVER THE FULL 0 TO 20M A RANGE.T HE OUTPUT WILL DRIVE TO A SLIGHT NEGATIVE M A, ALLOWING A LIVE ZERO TO BE ACHIEVED WHEN USING A 0
TO 20M A RANGE.A VOLTAGE OUTPUT IS EASILY PRODUCED BY CONNECTING A RESISTOR TO THE OUTPUT.
模拟输出信号可在任意仪器内部信号中选择，例如，重量，流量等。
I N ADDITION THE ANALOG OUTPUT SIGNAL IS SELECTABLE TO COME FROM ANY INTERNAL SIGNAL IN THE INSTRUMENT E.G WEIGHT, FLOWRATE ETC.
开关量输出OUT1..OUT8D IGITAL O UTPUTS
开关量输出功能能够进行编程以运行任意内部信号。这些信号包括了开关量输入状态，运行条件（运行，
暂停等）及检测任何故障情况。此功能使得仪器接驳其它系统变得更简单。
T HE DIGITAL OUTPUTS ARE PROGRAMMABLE TO OPERATE FROM ANY INTERNAL SIGNAL.T HESE SIGNALS INCLUDE THE DIGITAL INPUT STATES, STATUS CONDITIONS (RUNNING, PAUSED ETC) AND
ANY FAULT CONDITIONS THAT ARE DETECTED.T HIS MAKES IT EASY CONNECT INTO OTHER SYSTEMS.
通信 & 显示C OMMUNICATIONS &D ISPLAY
数据交换C OMMS
本仪器提供独立的 RS232 及 RS485 通信接口，用于连接变送器与显示器，或其它设备。例如，ASCII 输
出协议可驱动打印机或 Modbus 进行更高层次的交互式通信，波特率及节点地址都可进行编程。
RS232 AND RS485 PORTS ARE AVAILABLE.T HESE ARE USED TO CONNECT DISPLAY TO TRANSMITTER AND ALSO TO CONNECT TO OTHER SYSTEMS.T HE PROTOCOL IS EITHER ASCII OUTPUT FOR
EXAMPLE TO DRIVE A PRINTER OR M ODBUS FOR INTERACTIVE COMMUNICATIONS.B AUD RATES AND NODE ADDRESSES ARE PROGRAMMABLE.
打印及设计功能P RINTOUTS &D ESIGNS
打印功能可通过现场操作或预置打印时间与周期来实现。数据能够连续输出以作为数据收集用途。打印数
据经由 COM1 RS232 接口输出，打印内容可通过打印设计功能进行编辑。
P RINTOUTS CAN BE TRIGGERED BY A KEY PRESS OR SET UP TO OCCUR AT SET TIMES DURING THE DAY OR WEEK.D ATA MAY ALSO BE OUTPUT CONTINUOUSLY FOR DATA COLLECTION PURPOSES.
D ATA IS OUTPUT ON TH
E COM1RS232 PORT.T HE CONTENT O
F THE PRINTOUTS IS FULLY PROGRAMMABLE USIN
G D ESIGNS.
设计功能可被用于自定义打印，也可用来执行算术计算。设计语言也包括更高级的编程条款。
D ESIGNS AR
E PROGRAMS USED TO CUSTOMISE PRINTOUTS, BUT CAN ALSO BE USED TO PERFORM ARITHMETIC CALCULATIONS.T HE D ESIGN LANGUAGE ALSO CONTAINS CONDITIONAL TERMS FOR
MORE ADVANCED PROGRAMMING.
显示界面自定义D ISPLAY C USTOMISATION
键锁功能可被用来防止未经许可的仪器操作及限制进入操作菜单。可对任意键进行密码锁定，以防止未经
授权的非法操作。当进行按键操作时，系统也将提醒操作员进行操作确认。操作菜单可增添额外设置或操
作信号以满足用户自定义要求。
L OCKS MAY BE SET TO PREVENT UNAUTHORISED USE OF THE OPERATOR KEYS AND RESTRICT ENTRY TO THE OPERATOR MENU.T HE KEYS ARE INDIVIDUALLY LOCKABLE AND OPTIONALLY A PASSCODE
CAN BE USED TO ALLOW AUTHORISED OPERATORS TO USE THE KEYS.A LTERNATIVELY A CONFIRMATION OF THE KEY ACTION CAN BE REQUESTED.T HE OPERATOR MENU CAN BE CUSTOMISED TO
MAKE ADDITIONAL SETTINGS OR SIGNALS AVAILABLE TO THE OPERATOR.
显示器显示内容自定义适用于不同现场要求，显示屏既可显示全部参数，也可仅显示基本参数。
T HE CONTENTS OF THE MAIN DISPLAY CAN BE SET TO SUIT ANY CONDITION, FROM A COMPREHENSIVE DISPLAY SHOWING ALL OPERATING PARAMETERS TO A SIMPLE DISPLAY SHOWING THE BASIC
SIGNALS.
与电脑连接C OMPUTER C ONNECTIVITY
ActiveX 控制组件使得 ModWeigh 系统与计算机间的通讯变得更加简单，典型应用是编程及搜集 VB 程序
来实现计算机控制。
A N A CTIVE X CONTROL IS AVAILABLE TO ALLOW PROGRAMMERS TO EASILY COMMUNICATE WITH A M OD W EIGH INSTRUMENT.T YPICALLY THIS CAN BE USED WITH A V ISUAL
B ASI
C PROGRAMME TO
COLLECT AND WRITE DATA TO THE CONTROLLER.
ModWeigh 输入/输出
以下表格标示了各输入及输出功能。
T HE FUNCTION OF EACH INPUT AND OUTPUT IS SHOWN IN THE TABLE BELOW.
用户可对每项输入及输出功能进行编程。
T HE FUNCTIONS OF EACH INPUT OR OUTPUT ARE USER PROGRAMMABLE .
输入/输出功能所匹配的不同硬件类型（及可选件）
MT2x MT4x MT6x MT8x MW99dx AI1 (称重传感器)
z
z
z
z
模拟量输入
AI2 (4-20mA 0-10V) MO2 MO2
AO1 (4-20mA) z z z z 模拟量输
出 AO2 (4-20mA) MO2 MO2 IN1 脉冲输入 z z z z IN2 获取零值 z z IN3 运行 z z IN4 总量清零 z z IN5 打印 z IN6 打印总量 z IN7 停止 z 开关量输入
IN8 暂停 z OUT1 脉冲输出 z z z z OUT2 运行中 z z z z OUT3 运行马达 z z OUT4 无故障备妥信号 z z OUT5 称重故障 z OUT6 皮带速度故障 z OUT7 进物料 z
开关量输出 OUT8 报警提示
z
COM1 (RS232)
z z z z z 接口格式
COM2 (RS485) z z z z z
技术规格说明
S PECIFICATIONS
称重传感器输入 AI1 L OADCELL I NPUT
输入范围
±4 mV/V (0-32mV)
I NPUT R ANGE
激励
8 Vdc ±10 %, 250 mA 最大电流 (MAXIMUM CURRENT ) E XCITATION
信号处理率
100 Hz (重量采集时间设定≤ 0.5 s) (RESPONSE TIME SETTING )
S IGNAL PROCESSING RATE
输入灵敏度 0.5 µV/最大分度 (DIVISION MAXIMUM )
I NPUT SENSITIVITY动态秤
零值范围: ±30 mV.
Z ERO RANGE
调零温度系数
±0.02 µV+0.0005 % 典型恒载/°C (OF DEADLOAD /°C TYPICAL )
Z ERO DRIFT
满量程温度系数 ±0.0005 %/°C 典型 (TYPICAL )
S PAN DRIFT
非直线性误差 <0.002 % 之 FS (OF FS)
N ON -LINEARITY
信号输入干扰系数 0.15 µVp-p 典型 (TYPICAL )
I NPUT NOISE
滤波设置
0.04 s to 32.0 s 可调重量采集时间 (RESPONSE TIME ADJUSTABLE )
F ILTERING
输入阻抗 >1000 M Ω.
I NPUT IMPEDANCE
输入电阻灵敏度 >100 k Ω
S ENSE INPUT IMPEDANCE
电压灵敏度范围 3-10 V
S ENSE VOLTAGE RANGE
模拟量输入 AI2 A NALOG I NPUT
4-20mA 输入电阻 47 Ω
4-20M A INPUT RESISTANCE
0-10V 输入电阻
> 1 M Ω
0-10V INPUT RESISTANCE
绝缘 : 不绝缘，所有 0V 接线端都是通用的
I SOLATION NOT ISOLATED, ALL 0V TERMINALS ARE COMMON
模拟量输出 AO1 & AO2A NALOG O UTPUTS
输出范围0 to 20 mA (-90 µA to 21 mA, includes standard 4-20mA)
O UTPUT RANGE
Ω @ 24 V 电源供应, 500 Ω @ 12 V(SUPPLY)
最大负载 1000
M AXIMUM LOAD
µA
数据采集率 0.4
R ESOLUTION
重量采集时间称重传感器反应时间设置 + 20 ms(L OADCELL RESPONSE TIME SETTING)
R ESPONSE TIME
电压输出使用外置电阻器将电流转换为电压。
V OLTAGE OUTPUT U SE AN EXTERNAL RESISTOR TO CONVERT M A TO VOLTS.
例如，500Ω电阻可将 20mA 转换为 10V。
F OR EXAMPLE 500Ω GIVES 10V AT 20 M A.
非直线性误差< 0.01 %
N ON-LINEARITY
温度系数< 1 µA/°C.
D RIFT
开关量输入 IN1..IN8D IGITAL I NPUTS
高电压> 8 V
H IGH VOLTAGE
低电压< 4 V
L OW VOLTAGE
V
最大电压 32
M AXIMUM VOLTAGE
Ω to 4800 Ω
输入负荷 3200
I NPUT LOAD
输入类型PNP output sensors
I NPUT TYPE
IN1 输入频率
FREQUENCY INPUT
最大范围0.01Hz to 4 kHz
M AXIMUM RANGE
典型操作范围10 to 1000 Hz
T YPICAL OPERATING RANGE
脉冲功率循环20 % to 80 %
P ULSE DUTY CYCLE
频率改变率< 20% per ms
R ATE OF FREQ CHANGE
IN1设置为 NAMUR 测速传感器
SET TO NAMUR
V
接线端电压 8
T ERMINAL VOLTAGE
mA
开关临界值 1.55
S WITCHING THRESHOLD
mA
滞后量 0.2
H YSTERESIS
Namur 测速传感器故障< 0.1 mA or > 6 mA
N AMUR FAULT
开关量输出 OUT1..OUT8D IGITAL O UTPUTS
A
最大输出电流 0.25
M AX OUTPUT CURRENT
电源电压8 Vdc < +V1 and +V2 < 32 Vdc
S UPPLY VOLTAGE
OUT1 输出频率
FREQUENCY OUTPUT
Hz
最大频率 500
M AX FREQUENCY
功率循环50 % ±20 % (f > 0.5 Hz)
D UTY CYCLE
最大输出脉冲时间1000 ms (f < 0.5 Hz)
M AX OUTPUT PULSE TIME
接口格式 COM1 & COM2C OMMUNICATIONS
COM1 连接 RS232
COM1I NTERFACE
能够使用 CAN BE ENABLED
COM1 同步交换 CTS
COM1H ANDSHAKE
COM2 连接 RS485
COM2I NTERFACE
波特率9600, 19,200, 38,400, 57,600 and 115,200
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