Modbus Constructor
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Modbus Constructor Quick start Guide © 2006 by KurySoft, all rights reserved Web: www.kurysoft.com Date: 24-Oct-2006 ModBus Constructor Table of Contents 1. Introduction........................................................................................................ 3 2. Creating a Modbus Device Description ............................................................. 4 2.1 Coriolis Mass Flow Meter..................................................................................... 4 T1. Mass Flow Metter Holding Registers .............................................................................. 4 T2. Mass Flow Meter Coils ................................................................................................... 6 T3. Mass Flow Metter Command .......................................................................................... 6 T4. Mass Flow Metter Exception Responses........................................................................ 6 2.2 Key Parameters Descriptions............................................................................... 7 2.3 Arranging Data Fields Inside the Form Window ................................................ 13 2.4 Adding Requests................................................................................................ 14 2.5 Simulator Parameters ........................................................................................ 19 T5. Discrete value simulation.............................................................................................. 19 T6. Analogous value simulation. ......................................................................................... 20 3. Using Modbus Device...................................................................................... 21 4. Terms And Definitions ..................................................................................... 23 4.1 Objects ............................................................................................................... 23 4.2 Modbus Constructor Data Types ....................................................................... 23 4.3 Data Encoding.................................................................................................... 24 Long.................................................................................................................................... 24 Float.................................................................................................................................... 24 Double ................................................................................................................................ 24 4.4 Modbus Functions Application Rules ................................................................. 25 4.5 Format examples ............................................................................................... 25 5. Contact Information ......................................................................................... 27 Quick Start Guide -2- ©2006 KurySoft. www.kurysoft.com ModBus Constructor 1. Introduction Thank you for using Modbus Constructor! Modbus Constructor was created to help developers, programmers and users in testing and setting up their Modbus devices. Modbus Constructor allows to quickly create a data management model for any of your Modbus devices. There are similar programs on the market all of which, however, display data as columns of abstract numbers of the same type. This makes them hard to read and analyze, especially if your device uses randomly arranged data of various types. In Modbus Constructor you can work with any of the key data types: integer, long (integer), float, double (float), or byte for any individual register or a set of registers. Integer types may be represented as signed, unsigned, HEX or binary. The same register can be represented in various ways. For example, if there are two adjacent registers that contain long numbers, each of these registers can be given additional data fields in which their content will be represented as HEX or unsigned integer. Data fields corresponding to your data elements (registers or discreet elements) can be arranged to your liking inside the project form window. You can specify size, color, font and caption for each field. The discreet elements occupying a continuous addresses domain can share the same field, which makes them easier to read and saves time. In Modbus Constructor you can setup any register data field to perform a linear transformation to convert the internal units into conventional or alternative units of any system. For example, if a register contains pressure in milliamperes, i.e. the device receives data from a pressure detector equipped with a current output, the resulting value can be converted to kgf/cm2 or lb/in2. Modbus Constructor supports automatic requests for all supported functions (01, 02, 03, 04, 05, 06, 15, 16, 22, 23) with individual periods for each one. You can setup requests to be executed via menus and/or dialogs, whichever preferred. This is a convenient way of setting up control commands, changing parameters and test requests. Any project may be used for querying a device in Master mode or simulating it in Slave mode. For the Slave mode you may additionally include a data modification procedure operating according to this or that rule. In Modbus Constructor your project can be further enhanced with additional captions, frames and images. Modbus Constructor comes with a special utility, Modbus Reader, which operates using the model created with Modbus Constructor to interact with your device. Modbus Reader is a freeware program. If you have already created a Modbus Constructor project for the device you designed, your clients will not have to purchase Modbus Constructor – it is enough to download a freeware Modbus Reader. Modbus Reader can run several projects at once, i.e. query or simulate several devices using one or more COM-ports. In addition to the requests specified in your project, you can modify any of your device's data elements by simply clicking on any associated data field, whether in Master (by sending an appropriate request) or Slave mode. Quick Start Guide -3- ©2006 KurySoft. www.kurysoft.com ModBus Constructor 2. Creating a Modbus Device Description In this section you will go through the steps of creating a project, with Coriolis mass flow meter as an example: you will learn how to describe the device's holding registers and coils convert data into standard units use data formatting feature arrange data fields within the form define automatic and menu controlled requests (commands) specify parameters for simulator Slave mode 2.1 Coriolis Mass Flow Meter Let's study the design of our device. The unit is used for measuring the mass of liquids or gasses that are channeled though it. It can be operated both at direct and reverse flow. At direct flow the mass flow meter counts forward, at reverse flow it counts backward and may show negative readings. As an extra option, the device can be operated as a dose-meter. It is equipped with two discrete outputs (open collector) for controlling either valve or motor at direct or reverse flow. The portion is set by the user. If a positive portion value is set, the direct flow is activated, if negative, the reverse flow is activated. The system uses a RS-485 Modbus RTU protocol. Run Modbus Constructor: Start ⇒ Programs ⇒ ModbusConstructor ⇒ MBConstructor.exe Create a new project: File⇒New Save your project to a file titled Coriolis.mbc: File⇒Save as… Lets analyze the mechanism of the mass flow meter's Modbus communications protocol. In Table T1 there is a description of the unit's holding registers. T1. Mass Flow Metter Holding Registers Function Address (decimal) Data Type Notes Device type 0000 unsigned integer Read-only Firmware version 0001 unsigned integer Read-only Modbus address 0002 unsigned integer Factory setting 1 Either 4800, 9600, or 19200 bod Data transfer speed 0003 unsigned integer Factory setting 9600 When writing any value other than 4800, 9600, or 19200 takes on a value of 9600 0-no parity Parity 0004 byte (MSB) 1-odd parity 2-even parity Factory setting 2 (even) Quick Start Guide -4- ©2006 KurySoft. www.kurysoft.com ModBus Constructor Function Address (decimal) Data Type Stop bit 0004 byte (LSB) Portion 0005 long (1) Notes 0 – 1 stop bit 2 – two stop bits (3) One unit equals 0.1 kg One unit equals 0.1 kg, can be negative Mass counter 0007 long (1) While reading displays accumulated mass after meter reset One unit equals 0.1 kg/min Mass flow 0009 integer Positive with direct flow Negative with reverse flow Density 0010 unsigned integer One unit equals 1000/32768 kg/m3 Temperature 0011 integer One unit equals 250/511 ºC Overpressure detector signal 4-20 mA Pressure 0012 unsigned integer 1023 corresponds to 20 mA (40 kgf/cm2) 205 corresponds to 4 мА (0 kgf/cm2) Measuring time 0013 unsigned long (1) seconds Check register 0015 unsigned integer (2) Mass per single pulse 0016 unsigned integer One unit equals 0.1 kg Calibration factors 0017-0024 Available for recording with jumper J7 installed Reserve 0025-0031 not used in current version (1) Long integers are placed in holding registers in the following manner: the upper word occupies the first register, the lower word occupies the second register. For example, the number 01020304h (16909060 decimal) shall be placed as follows: register A+0: 0102h register A+1: 0304h transferred: 01 02 03 04 (2) While reading, displays operating mode: 0 – measure mode (default) 1 – dose-meter inactive mode. Both valves are closed. 2 – dose-meter active mode. One of the valves is open, a portion is being measured. While writing, performs the following actions: 0 – switches into measure mode from dose-meter inactive mode. Ignored if dose-meter is in active mode. 1 – when in measure mode, switches to dose-meter inactive mode, resets mass and time meters, closes both valves. When in dose-meter active mode, switches to inactive mode. 2 – starts measuring a portion in accordance with register 5 value (portion size) 4 – resets mass and time meters (counters) (only in modes 0 and 1) 8 – performs zero flow value adjustment (only in modes 0 and 1) (3) used to store portion size value when in dose-meter mode. Quick Start Guide -5- ©2006 KurySoft. www.kurysoft.com ModBus Constructor Table T2 represents a description of the unit's coils. T2. Mass Flow Meter Coils Function Address (decimal) Data Type Notes Read-only in dose-meter mode Direct flow control output 0000 1-valve open 0-valve closed Read-only in dose-meter mode Reverse flow control output 0001 1-valve open 0-valve closed Reserve 0002-0031 not used in current version Mass flow meter supports the following commands and exceptions: T3. Mass Flow Metter Command Function code Command type Name 01 Read Read coil status 03 Read Read holding registers 05 Write Write single coil 06 Write Write single register 15 Write Write multiple coils 16 Write Write multiple registers T4. Mass Flow Metter Exception Responses Code Name Description 01 Illegal function Function code not supported. 02 Illegal data address The data address in the request is not an allowable address for the device. 03 Illegal data value A value contained in the request data field is not an allowable value for the device. Quick Start Guide -6- ©2006 KurySoft. www.kurysoft.com ModBus Constructor 2.2 Key Parameters Descriptions Add descriptions for registers and coils of your mass flow meter. In the Settings menu select Objects: Settings ⇒ Objects The program will display a form which is much like an electronic spreadsheet. In the Object column highlight fifteen cells (as many as there are registers of the mass flow meter). Right-click inside the highlighted area to view a drop-down menu showing all types of objects used. Click Holding register. Quick Start Guide -7- ©2006 KurySoft. www.kurysoft.com ModBus Constructor Now it's time to give each register its address and title according to the description. left-double-click on the topmost empty cell in the Label column enter register name: "Device type" left-double-click on the adjacent cell in the Address column, enter "0" enter names and addresses for other elements. The numbers (long, float and double) that are represented using several registers may reside inside the registers and, therefore, have different representations. Equipment manufacturers normally make explicit indications as to how these numbers are represented. To learn how the numbers are stored inside registers refer to the "Data Encoding" section. The description suggests that our device uses different data types. Specify the required types. right-click inside the Data column and select a desired item from drop-down menu if necessary, set Unsigned in the Show column. Quick Start Guide -8- ©2006 KurySoft. www.kurysoft.com ModBus Constructor We have specified kilograms (kg) for units of mass, but the mass counter's unit equals 0.1 kg, doesn't it? Modbus Constructor has a special mechanism to overcome such problems. If expression Ax+B is entered in column Scale, the number held in the corresponding register or a group of registers (if it is a complex number of type long, float, or double) will be subject to a liner transformation. This is very convenient if you prefer to use units other than those supported by the device. Enter expression "0.1x+0" in the Scale column for holding registers 5, 7, 9, and 15. Now the mass flow meter's internal units are turned to kilograms. Density can be transformed in much the same way: D = x * 1000 / 32768 = 0.03052x And temperature, too: T = x * 250 / 511 = 0.489x Quick Start Guide -9- ©2006 KurySoft. www.kurysoft.com ModBus Constructor Pressure is somewhat more difficult, it requires an equation: Pressure P = Ax + B x1 = 205, P1 = 0 ⇒ B = - 205 * A x2 = 1023, P2 = 40 ⇒ 40 = A*1023 + 205*B A = 40/(1023 - 205) = 0.049 B = -205*A=-205*0.049 = -10.045 You see, it is not at all difficult to convert values into units that look familiar. But what about time? For short intervals seconds are good enough, but when the measurement involves hundreds and thousands of seconds, they begin to get in the way. To solve this problem we apply formatting. Data formatting is used: to get better readable numbers to avoid numbers overcrowding the output field Each data type has been assigned a format by default. You do not have to specify the default format yourself if you are happy with what is already there, just leave the field blank. Use the default format to create your own format. More information on the rules of formatting can be found in the Format examples section. Right-click on the Portion, kg line inside the Format column. Select Default. The field will display a string "## ###". The mass flow meter measures mass and mass flow with accuracy 0.1 kg and 0.1 kg/min respectively. If the default format is left intact, we shall not see the fractional parts of the numbers. To display them, ".0" should be added to the string. We get: "# ### ### ##0.0" for mass and portion measured "## ##0.0" for flow rate Quick Start Guide - 10 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor Since the pressure detector's analog-to-digital converter delivers resolution 0.05 kg/cm2, it makes sense to have two digits after the decimal point: "## ##0.00" Enter "10" in the Default value field for register "Pressure, kgs/cm2". Click Enter. The value will be displayed in the format "10.00". Leave temperature and density as integers. Setup a two-mode time display. Let the first mode remain in seconds and use "hh:mm:ss" formatting for the second mode to display time in the "hours : minutes : seconds" format. double-click inside an empty field in the Object column select Holding register double-click in the same line in the Data column select type Long select the Unsigned attribute in the Show column enter "Time, hh:mm:ss" in the Label field in the address field, enter "13" enter "hh:mm:ss" in the Format field in the Default value field, enter "1000" (time in seconds) click on Address column header to have holding registers sorted in ascending order 1000 seconds will now be displayed as "00:16:40" Quick Start Guide - 11 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor Finally, add coils descriptions: using your mouse, highlight two empty cells in the Object column right-click inside the highlighted area select Coils in the drop-down menu title one of the coils "direct flow", assign "0" for address title the other coil "reverse flow", assign "1" for address You have now added descriptions for all the key properties of the mass flow meter's objects. Press "OK". Save your project: File⇒Save. Quick Start Guide - 12 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor 2.3 Arranging Data Fields Inside the Form Window In the upper right-hand corner of the form window you will find data fields and tags of the objects we have created. Left-click inside any white field to have it highlighted in dark blue. Leftclick inside the highlighted field and move it aside while holding down the mouse button. For multiple selections, press and hold Ctrl while clicking on as many objects as you need. Continue in the same manner to arrange the other fields until all the tags are in sight. Please note that when a field is moved its tag follows it to a new location, but when the tag is moved, the field stays behind. Highlight the "Mass counter, kg" tag. Stretch the tag out by pulling its left side to make it fit a single line. Do the same with the other tags. For better readability, separate the fields of the parameters to be tested from all the other fields. Start with the upper left-hand corner of the form. To visually isolate groups of fields use frames. Right-click inside the form. From the context menu select Add ⇒ Frame. Change frame position and size to fit it around the group of fields. Follow the same steps to arrange the fields pertaining to controls and communication parameters. Quick Start Guide - 13 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor Press Ctrl+S to save your project. 2.4 Adding Requests For remote devices to deliver data and perform their actions, Modbus protocol uses standard requests. In Modbus Constructor requests are processed in one of three ways: automatically via menu via dialog Open the requests setup window: Settings⇒Requests. At the bottom of the window there is a table which contains all the elements of the data structure. At the top there is a table for the parameters of the requests. First let's create automatic requests to read the content of our device's registers and coils. double-click inside an empty cell in the Function column from the pop-up menu select 03.Read holding registers. The program will add a line with default request settings click once more on the new line in the Address column of the bottom table highlight all the cells to do with registers right-click inside the highlighted area Quick Start Guide - 14 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor from the pop-up menu select Apply Do the same for the coils. Use the function 01.Read coils. You can change the minimum period of the request. To do so, double-click the appropriate cell in the Min.period, ms column. Enter 300 milliseconds for both requests. Please note that this parameter defines the least possible period for querying data specified by the request. This period may get longer because of the time required for processing other requests. Set this parameter to 0 to make the request period as short as possible. To effectively control the mass counter you need to input commands. A command is specified by entering a certain value into the check register with address 15. create a request "06.Write single register" in the column Write address of the bottom table highlight a cell whose address is 15 (control register) right-click inside the cell in the pop-up menu click Apply double-click inside a cell in the Write column enter "0" – this is the value to be written into the control register when the command is executed in the Label column of the top table enter the name of your command: "Measure mode". This name will appear as an item of the user menu. double-click inside a cell in the Control column Quick Start Guide - 15 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor select Menu 1 from the pop-up menu follow the same procedure to create commands: "Dose-meter mode" (value 1) "Measure portion" (value 2) "Counters reset" (value 4) "Zero adjustment" (value 8) Create commands to control valves: create a request "15.Write multiple coils" in the Write address column of the bottom table highlight cells with addresses Coils 0 and 1 right-click inside the cells click Apply in the pop-up menu double-click inside a cell in the Write column for address 0, enter "1" double-click inside a cell in the Write column for address 1, enter "0" when this command is executed, the forward valve will open and the reverse valve will close title this command "Forward flow open" Create a "Reverse flow open" command: For the coil with address 0 set value "0" For the coil with address 1 set value "1" Finally, create a "Shut flow" command to shut-off both valves: set "0" for both coils Quick Start Guide - 16 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor Some of the commands are used for controlling the unit in the dose-meter mode, while the others are for the measure mode, because the valves cannot be controlled in the dose-meter mode. There are two commands that are shared between the two modes: "Zero reset" and "Zero adjustment". In the menu position them apart from each other. To do this: create two requests, for example, "01.Read coils" set control parameter "Menu 1" enter symbol "-" (hyphen) in place of the name These requests will not be available from the menu but will serve to separate the items. left-click on a cell from the Function column while holding the button pressed, drag the grey box to a position between the commands "Measure portion" and "Counters reset" follow the same steps to arrange the items as shown below Quick Start Guide - 17 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor In the Menu caption tab change the title from "Menu 1" to "Control". Press OK. Save project: Ctrl+S. There is a new drop-down menu item Control: The same menu will appear in the Modbus Reader window as soon as you open your project there. You will be able to use the menu to run the commands you have created. In Modbus Constructor this menu stays inactive. Now it is time to specify dialogs to change the settings of the remote device. Once again open the Requests form. create a request "16.Write multiple register" title the request "Portion size" set address to "5" create a request "16. Write multiple register" title the request "Communication parameters" set addresses to 2 to 4 Quick Start Guide - 18 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor create a request "06.Write single register" title the request "Mass per pulse, kg" set address to "16" set a control parameter for all three commands "Dialog (menu 2)" change title "Menu 1" to "MFM Settings" press "OK" save project: Ctrl+S There is now a new drop-down menu item "MFM Settings". Open the menu and select "Communication parameters". A dialog will appear to help you change mass flow meter's communication parameters. When using Modbus Reader, the data fields of these dialogs will contain either the current values received directly from the device via read commands, or the default values. The default values are used if the corresponding data had never been read before the dialog was open, for example, if automatic requesting had been deactivated. 2.5 Simulator Parameters A project created using Modbus Constructor can be used with the help of Modbus Reader either for requesting the device in Master mode or simulating it in Slave mode. In the Slave mode you can change the values of the registers and discrete data either manually or automatically according to a function specified. The function can be setup using parameters: Default value, Value1, Value2, Period. The following rule applies to discrete elements and registers which are either Hex or Binary: T5. Discrete value simulation. Time 0 < t < 1/3 Period Data Element Value Default value 1/3 Period < t < 2/3 Period Value1 2/3 Period < t < Period Value2 Period < t < 4/3 Period 4/3 Period < t < 5/3 Period Default value Value1 … … For registers that contain data of types, such as Float, Double, as well as integers that are either Signed or Unsigned, the following rule applies: Quick Start Guide - 19 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor T6. Analogous value simulation. Time 0 < t < 1/3 Period Data Element Value linear function from Default value to Value1 1/3 Period < t < 2/3 Period linear function from Value1 to Value2 2/3 Period < t < Period linear function from Value2 to Default value Period < t < 4/3 Period 4/3 Period < t < 5/3 Period linear function from Default value to Value1 linear function from Value1 to Value2 … … If the Period equals to zero, the Default value is used. Open the window Objects: Settings⇒ Objects and setup the simulation parameters as shown below. Please note that the Value1 of the Time element equals one third of the period value, while Value2 equals two thirds. In this case, the Time value will match precisely the time that elapsed since the connection was established. press "OK" save your project: Ctrl+S Quick Start Guide - 20 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor 3. Using Modbus Device This section instructs how to interact with a device for which a description was created using Modbus Constructor. Instead of a real-life device we shall use a simulator. If your computer has two COM ports, connect them with a null modem cable. One of the COM ports will be used by the master, the other by the slave. If your computer has only one COM port, install Modbus Reader to another computer with at least one COM port and connect two computers with a null modem cable. You can download a separate Modbus Reader installation file here: http://www.kurysoft.com/download.html Run Modbus Reader: Start ⇒Programs ⇒ModbusConstructor⇒MBReader.exe open file Coriolos.mbc. in the Mode menu set the flag Master in the Connection menu select the first СОМ port (for example, СОМ1) open another file Coriolos.mbc. in the Mode menu set the flag Slave in the Connection menu select the other СОМ port (for example, СОМ2) place both forms side by side so that all data fields are available. If necessary, change window size make sure that the communication parameters are the same for both COM ports. To open a dialog used to change the communication parameters press Ctrl+P make sure that Master and Slave have the same ID. To open a dialog used to change ID press Ctrl+I make sure that in the Mode menu Auto request enable has been flagged for the Master form, and Simulation enable for the Slave form Please note that data fields are empty on the Master form and show default values in the Slave form. Press F3 to establish connection. You will see that data on the Master form change in step with the data on the Slave form. Quick Start Guide - 21 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor When the Master form is active, two additional menus become available, those which you had created in the "Adding Requests" section, titled Control and MFM Settings. Click on the Master form to make it active. Use these menus to see how your data will change with your commands. You can directly edit the elements' data on the Slave form when the simulation mode is off: click on the Slave form remove the Simulation Enable flag in the Mode menu The data will stop changing. double-click inside the "Density" field of the Slave form enter some number press Enter A corresponding field of the Master form will display the same number as soon as the Master performs the next register read request. In the same manner you can write individual values to your device' registers and discrete elements. double-click inside the "Density" field of the Master form enter some number press Enter After you complete your session, don’t forget to save current settings if you feel you might need them later. From the File menu select Save session. Save your file as Coriolis.mbs. Now that you are familiar with the basic principles of operating Modbus Constructor and Modbus Reader, you can create your own projects for real Modbus devices much faster than it took you to complete this example. Quick Start Guide - 22 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor 4. Terms And Definitions 4.1 Objects In Modbus specifications an object is a data element which can be either read or written independently from other data. There are four types of objects: 1. Coil single bit Read-Write 2. Discrete input single bit Read-Only 3. Holding register 16-bits word Read-Write 4. Input register 16-bits word Read-Only 4.2 Modbus Constructor Data Types Modbus Constructor supports the following data types: Numeric types Type Quantity of bits Quantity of registers integer (signed or unsigned) 16 1 long 32 2 float 32 2 double 64 4 MSByte (signed or unsigned)* 8 ½ (most significant byte - MSB) LSByte (signed or unsigned)* 8 ½ (least significant byte - LSB) (signed or unsigned) *Byte (MSB or LSB) cannot be read or written independently from the other byte of the holding register. Discrete types Type single multiple Quick Start Guide Quantity of bits 1 2-16 - 23 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor 4.3 Data Encoding Long types, long, float, and double, are represented using several consecutive holding registers. There are two methods of storing such numbers in the registers: direct and swapped (inverse). Long B3 B2 B1 B0 MSB LSB Register A Register A+1 Transmitted first Default B1 B0 (LSB) B3 (MSB) B2 B3 (MSB) B2 B1 B0 (LSB) Swapped last Float B3 B2 B1 B0 SEEEEEEE EMMMMMMM MMMMMMMM MMMMMMMM Where floating point value = S1.M * 2E-127 Register A Register A+1 Transmitted first Default B1 B0 (LSB) B3 (MSB) B2 B3 (MSB) B2 B1 B0 (LSB) Swapped last Double B7 B6 B5-B1 B0 SEEEEEEE EEEEMMMMM MMMMMMMM MMMMMMMM Where double precision floating point value = S1.M * 2E-1023 Register A Transmitted first Default B1 Quick Start Guide Register A+1 Register A+2 Register A+3 last B0 B3 B2 - 24 - B5 B4 B7 B6 ©2006 KurySoft. www.kurysoft.com ModBus Constructor Swapped B7 B6 B5 B4 B3 B2 B1 B0 4.4 Modbus Functions Application Rules You can create a request for writing or reading any data element provided such element had been specified within your project. For example, if at least one Holding register has been specified, you can always use functions 03, 06. In the Options dialog (Settings menu) you can permit or lock additional functions for Holding register 16, 22, 23. If any of these functions have been locked, Modbus Reader will return Exeption 1 (Illegal Function) to any request which uses this function while in simulator mode. Key functions* Element Additional functions Coil 01 – Read coils 15– Read multiple coils Discrete input 02 – Read discrete inputs - Holding register Input register 16 – Write multiple registers 03 – Read holding registers 22 – Write mask register 06 – Write single register 23 – Read/write registers 04 – Read input registers - *At least one element must be specified. 4.5 Format examples Use the formatting feature to have your data displayed in a more convenient format. Formatting helps you avoid numbers with too many digits after decimal point. Numeric types: Number Format Displayed 12345 ### ##0 12 345 12345 0 000 000 0 012 345 123.45678 # ##0.000 123.457 123.45678 0.00 E+00 1.23 E+02 12 +## 000 + 012 0.45678 .000 000 000 .456 780 000 12345 hh:mm:ss 03:25:45 Quick Start Guide - 25 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor If data field contains several discreet elements, formatting helps to visually separate these. Discrete types Bits Format Displayed 11110000 0000 0000 1111 0000 11110000 0000 0 0 0 0 0000 0 0 0 0 11110000 0 11110000 11110000 00 1111000 0 11110000 000 00 000 111 10 000 Default for numeric types Type Format integer ## ##0 long # ### ### ##0 byte ##0 float 0.00 double 0.000 E+00 Default for discrete types Type Format single (1) 0 multiple 2 00 multiple 3 000 multiple 4 0000 multiple 5 0 0000 multiple 9 0 0000 0000 multiple 16 0000 0000 0000 0000 Quick Start Guide - 26 - ©2006 KurySoft. www.kurysoft.com ModBus Constructor 5. Contact Information Please refer to the E-mail addresses below for further information. info@kurysoft.com General information and feedback. Any suggestions and comments will be welcomed! support@kurysoft.com Customer technical support service or bug report. sales@kurysoft.com Purchase or registration code affairs. We will be happy to help you. Software distribution, promotion in software compilations, or business cooperation. We are open to various levels of cooperation. webmaster@kurysoft.com Exchanging links or placing advertisement. Visit our public web-site www.kurysoft.com for further information. Quick Start Guide - 27 - ©2006 KurySoft. www.kurysoft.com
