Modbus Slave user manual

Witte Software® https://www.modbustools.com

2023-11-19

1. Modbus Slave

Modbus Slave is for simulating up to 100 slave devices in 100 windows!. Speed up your PLC programming with this simulating tools. Start programming and test before you receive your slave device from supplier. Data contained with any open document is accessible to the master application. Same user interface as Modbus Poll.

Monitoring of serial traffic. OLE Automation for interfacing with Visual Basic, Excel etc. To interpret and show the Modbus data according to your specific requirements. E.g. edit your slave data in Excel. Try the Excel example.xls included with the program.

Each window opened within Modbus Slave may be configured to represent data from the same or different slave nodes.

1.1. System requirements for Modbus Slave

Hardware requirements: Processor; 1 GHz or faster recommended
1 GB RAM
5 MB of available hard drive space
1024 x 768 display resolution
OS requirements: All Windows versions from Windows 7 to Windows 11 are supported.
Modbus Slave version 8 runs on Windows XP.

1.1.1. Silent install

Silent install require no user intervention and have no user interface. The user doesn’t see any dialog and isn’t asked any questions.
Use the command line /S switch.

1.2. End User License Agreement

You should carefully read the following terms and conditions before using Modbus Slave. Unless you have a different license agreement signed by Witte Software, your use of this software indicates your acceptance of this license agreement and warranty. If you do not accept these terms you must cease using this software immediately.

Copyright.
Modbus Slave ("The Software") is copyright 2002-2023 by Witte Software, all rights reserved.

Evaluation and Registration.
This is not free software. You are hereby licensed to use the Software for evaluation purposes without charge for a period of 30 days.

If you use the Software after the 30 day evaluation period a registration fee is required.

Unregistered use of the Software after the 30-day evaluation period is in violation of U.S. and international copyright laws.

One registered copy of the Software may either be used by a single person who uses the software personally on one or more computers, or installed on a single computer used by multiple people, but not both.

For information on order and pricing, please visit https://www.modbustools.com/order.html

Modbus Slave licenses are perpetual. Once you buy a license to a specific major version, and as long as you abide by the license agreement, you can use that version forever with no additional cost.

Distribution.
Provided that you do not include your License Key you are hereby licensed to make copies of the Software; give exact copies of the original to anyone; and distribute the Software in its unmodified form via electronic means. You are specifically prohibited from charging for any such copies.

LIMITED WARRANTY.
THE SOFTWARE IS PROVIDED AS IS AND WITTE SOFTWARE DISCLAIMS ALL WARRANTIES RELATING TO THIS SOFTWARE, WHETHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

LIMITATION ON DAMAGES.
NEITHER WITTE SOFTWARE NOR ANYONE INVOLVED IN THE CREATION, PRODUCTION, OR DELIVERY OF THIS SOFTWARE SHALL BE LIABLE FOR ANY INDIRECT, CONSEQUENTIAL, OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE SUCH SOFTWARE EVEN IF WITTE SOFTWARE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR CLAIMS. IN NO EVENT SHALL WITTE SOFTWARE’S LIABILITY FOR ANY DAMAGES EXCEED THE PRICE PAID FOR THE LICENSE TO USE THE SOFTWARE, REGARDLESS OF THE FORM OF CLAIM. THE PERSON USING THE SOFTWARE BEARS ALL RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE.

2. Modbus Slave Features

2.1. Connections

Modbus Slave read/write data from devices using:

Modbus RTU or ASCII on RS232 or RS485 networks. (USB/RS232/485 Converter)
Modbus TCP/IP
Modbus Over TCP/IP. (Modbus RTU encapsulated in a TCP packet)
Modbus UDP/IP
Modbus Over UDP/IP. (Modbus RTU encapsulated in a UDP packet)

2.2. Supported Modbus Functions

01 (0x01) Read Coils
02 (0x02) Read Discrete Inputs
03 (0x03) Read Holding Registers
04 (0x04) Read Input Registers
05 (0x05) Write Single Coil
06 (0x06) Write Single Register
08 (0x08) Diagnostics (Serial Line only)
11 (0x0B) Get Comm Event Counter (Serial Line only)
15 (0x0F) Write Multiple Coils
16 (0x10) Write Multiple Registers
17 (0x11) Report Server ID (Serial Line only)
22 (0x16) Mask Write Register
23 (0x17) Read/Write Multiple Registers
43 / 14 (0x2B / 0x0E) Read Device Identification

2.3. Display formats

Each cell can be individual formatted.

Signed 16-bit register
Unsigned 16-bit register
Hex
Binary
32-bit signed integer with any word/byte order
32-bit unsigned integer with any word/byte order
64-bit signed integer with any word/byte order
64-bit unsigned integer with any word/byte order
32-bit float with any word/byte order
64-bit double float with any word/byte order

2.4. Miscellaneous features

OLE/Automation for interfacing with Excel VBA, Python etc.
Monitoring of data traffic
Print and print preview
Font selection
Conditional colors
Scaling
Real time charting
Save/Open workspace

3. Overview

Modbus Slave uses a multiple document interface. That means several windows can be opened. Each one with different data contents for simulation of different slave devices at the same time.

Modbus Slave Master simulator

This picture shows two open windows. One simulating 10 Holding registers from address 0 (40001) slave id 1 and another simulating 10 Holding registers from address 0 (40001) slave id 2.

3.1. Help from anywhere

Press F1 and get context sensitive help on a topic associated with the current selected item.

SHIFT + F1 invokes a special "help mode" in which the cursor turns into a help cursor (arrow + question mark). The user can then select a visible object in the user interface, such as a menu item, toolbar button, or window. This opens help on a topic that describes the selected item.

3.2. Name cells

Here you can type any text for designation of the value cells. You can also copy/paste text from Excel cells.

3.3. Value cells

Show the data values of the Modbus registers. If you double click a value cell a dialog box lets you enter a new value to the value cell. Typing a number in a value cell shows the input dialog as well.

Write single register

3.4. Change font

To change the font you have 2 options

Select the cells to be changed and then right click.
Select the cells to be changed and then Menu→Display→Font.

Font selection

3.5. Conditional colors

Conditional colors help you visually show values in specific ranges.

3 color options

Default color: This color is used if none of the conditional colors evaluates to true.
Rule 1: This color selection is used if the expression evaluates to true. Rule 1 has precedence over rule 2.
Rule 2: This color selection is used if the expression evaluates to true.

7 Comparison operators

not used
equal to
greater than
less than
greater than or equal to
less than or equal to
and

The "and" operator cannot be used when the data type is of float or 32 bit long type. The condition value is entered as a hex number if "and" is selected. It evaluates to true if any of the bits in both the cell and the condition value is 1.

3.5.1. Color example

Green color if the cell value is greater than 0 and red if less than 0.

Cell colors

3.6. Scaling

Scaling helps you scale raw values to human readable values. Scaling works only for signed and unsigned 16/32 bit integers.

Scaling

(X1,Y1) and (X2,Y2): A line passing through the two points (X1,Y1) and (X2,Y2)

\$Slope = m = (Y2 - Y1) / (X2 - X1)\$

Line equation: \$Y = m * (X - X1) + Y1\$
Precision: Number of digits after the decimal point.
Enable: Must be enabled to scale the value from the Modbus server/slave. Scaling is automatically disabled if other than a 16/32 bit integer display format is selected.

3.7. Real time charting

The chart can plot 12 series in real time with up to 100000 points in each series.

3.8. Open a new window

To open another window you have 3 options:

Press CTRL+N
Select new in the file menu
Press on the tool bar

4. Connection dialog

To open the connection dialog you have 2 options:

Press F3
Select connect from the connection menu

Connection setup

4.1. Connection

There are 5 different connection types:

Serial:
Modbus over serial line. RS232 or RS485. A USB serial converter can be used.
Modbus TCP/IP:
Select TCP/IP if you want to communicate with a MODBUS TCP/IP network. In this case, slave ID is the same as the Unit ID used in MODBUS TCP/IP.
The port number is default 502.
Modbus UDP/IP:
Select UDP/IP if you want to communicate with a MODBUS UDP/IP network. This is the same as Modbus TCP/IP but the connection less UDP protocol is used instead.
Modbus RTU Over TCP/IP:
This is a RTU message sent over a TCP/IP network instead of serial lines.
Modbus RTU Over UDP/IP:
This is a RTU message sent over a UDP/IP network instead of serial lines.

Connection type 3-5 is not standard Modbus as specified by www.modbus.org but they are added for convenience.

Depending on your selection some other settings will be grayed.

4.2. Serial Settings

Use these parameters to set serial port settings. They are only available if the connection type is "Serial Port".

Mode: Use this option to select RTU or ASCII mode. Default RTU.
DSR: Specifies whether the DSR (data-set-ready) signal is monitored for output flow control. If this member is TRUE and DSR is turned off, output is suspended until DSR is sent again.
CTS: Specifies whether the CTS (clear-to-send) signal is monitored for output flow control. If this checkbox is enabled and CTS is turned off, output is suspended until CTS is sent again.
RTS Toggle: Specifies that the RTS line will be high if bytes are available for transmission. After all buffered bytes have been sent, the RTS line will be low.
You can use this to switch direction if you have a 232/485 converter without automatic direction switch.

The use of RTS controlled RS232/RS485 converters should be avoided if possible. It is difficult to determine the exact time when to switch off the transmitter with non real-time operating systems like Windows and Linux. If it is switched off too early characters might still sit in the FIFO or the transmit register of the UART and these characters will be lost. Hence the slave will not recognize the message. On the other hand if it is switched off too late then the slave’s message is corrupted and the master will not recognize the message.

4.3. TCP/IP Server

TCP/IP server settings are only available when using an Ethernet connection.

IP Address: Specify which IP address to listen to. This is useful if you have several network connections on your PC. Each instance of Modbus Slave can listen to a specific network. Default is local host 127.0.0.1
Any Address: Check this on if you want Modbus Slave to listen on all networks.
IgnoreUnit ID: Many PLC devices will ignore this field, and most clients default value to zero. However gateways or specialized programs can use the unit number to indicate what type of processing is desired.
Port: Server port number. Default 502

5. Slave definition

Use this command to define the data array to be defined for the active window.

To open the Slave Definition dialog you have 3 options:

Press F8
Select "Slave Definition" from the Setup menu
Press on the tool bar

Slave definition

5.1. Slave ID

Range 1 to 255. (MODBUS protocol specifications say 247). The value 0 is also accepted to communicate directly to a MODBUS/TCP or MODBUS/UDP device.

5.2. Function code

You can select 1 of 4 function codes.

01: Read coils (0x). Accepts write functions 05 and 15
02: Read discrete inputs (1x)
03: Read holding registers (4x). Accepts write functions 06, 16, 22 and 23
04: Read input registers (3x)

5.3. Address

Addresses in the Modbus protocol are confusing! Some protocol specifications use the protocol/message address and others use device addressing.

5.3.1. Protocol/message address

Some protocol specifications use the protocol/message address counting from 0 to 65535 along with a function code. This is also what the new Modbus specifications use. This is the address inside the message sent on the wire.

Modbus Slave use protocol/message address counting from 0 to 65535.

5.3.2. Device address

Some protocol specifications use device address/registers. Registers counts from 1. The first digit describes the function to be used. That means the device address 40101 is identified by address 100. The "4" means Holding registers and 4x registers counts from 1. Therefore the ‘4XXXX’ reference is implicit. And even more confusing: 4x means function code 03 and 3x means function code 04!

5.3.3. 5 digits vs. 6 digits addressing

The address format 4x counts from 40001 to 49999. The next address is not 50000. In the old days 9999 addresses was enough. There are cases where 9999 is not enough. Then a zero is added. 40101 becomes 400101 and so on. This is called 6 digits addressing or extended addressing.

This is not a problem with Modbus Slave. 410001 become 10000. The "4" is thrown away and the rest 10001 is decremented by 1 as we count from 0 instead of 1.

5.3.4. Address examples

These examples show how to set up Modbus Slave if a specification uses device addresses.

Define Holding Registers

You want to define 20 registers from device address 40011 from slave ID 2. From the "4" we know this is function 03 "Read Holding Registers".

Slave ID = 2
Function = "03 Read Holding Registers (4x)"
Address = 10 (11 minus 1)
Quantity = 20

Define Discrete Inputs

You want to Define 1000 coils from address 110201 from slave ID 5. From the "1" we know this is function 02 "Read Discrete Inputs"

Slave ID = 5
Function = "02 Read Discrete Inputs (1x)"
Address = 10200 (10201 - 1)
Quantity = 1000

5.4. Hide name columns

Hide all name columns. This is convenient to make more space if they are not used.

5.5. Address in cell

If enabled, the address is also shown in the value cell like: 2000 = 00000

Address in cell

5.6. PLC Addresses (Base 1)

This option will show the addresses as device addresses.

PLC address

5.7. Rows

Specify the number of rows in the grid you prefer.

6. Real time Charting

Use this command to plot up to 12 data series in a chart in real time.
The real time chart is high speed and capable of drawing a new line as fast as new data is received.

All chart settings are saved in the workspace file. Save/Open Workspace

To open the Real time charting dialog you have 2 options:

Press Alt + R
Select "Real time Charting" from the Display menu

Real time charting

The X-Axis displays the number of seconds since the chart was started.

When the points reach the end of the chart there are 3 options:

Stop at end: The charting stops.
Restart at end: The charting starts all over again.
Continue: It continues until it reaches the max number of points or stop is pressed.

6.1. Settings

By default all 12 series are linked to the left Y-Axis. Check the "Right Y-Axis" check box if you want to link a series to the right Y-Axis.

Specify

Colors
Right Y-Axis
Title. If title is empty it is initialized with the name from the reading window
Offset

Show

File name
Address

The offset is useful to align data points on the same Y-Axis. For example, data points that are either 0 or 1 can be offset so they are not drawn on top of each other.

Series settings

6.2. Zoom function

Zooming in on the chart can be useful if you want to see more details. The zoom is controlled with the left mouse button. To zoom a specific part of the chart, simply left-click on the chart (this will be the upper-left corner of the zoomed rectangle) and drag to the bottom-right. A rectangle will appear. As soon as you release the mouse button, the axes will automatically adjust themselves to the region you have selected.

If you left-click on the chart (like for starting a zoom) but if you move to the top-left corner instead, all the modifications done with the zoom and pan features will be canceled (the chart will be in the state it was before the manipulations with the pan and zoom).

6.3. Pan function

To pan the control, right-click somewhere on the control and move the mouse. The point under the mouse will follow the movement of the mouse.

6.4. Link data to the chart series

The chart doesn’t know what data to use unless you link a Modbus data cell to one of the 12 series. To do this, select a value cell and choose "Link to chart" from Menu→Display.

Link to chart

6.5. Export series

Save series data to disk or copy to clipboard. Paste the data direct in Excel for further processing.
The file is given a .csv extension despite the use of a non-comma field separator.

Delimiters: Select the character that separates values in your text file. Use tab delimiter when copy/paste to Excel.

Furthermore some additional information is given.

Number of points
Max point value
Min point value
Average point value

save/copy series

7. Display formats

Mark the cells to be formatted. Select one of the 28 display formats from the display menu.

7.1. Native Modbus registers

The 16-bit Modbus registers can be displayed in 4 different modes.

Signed
Unsigned
Hex
ASCII - Hex
Binary

7.2. 32-bit signed integer

This combines 2 16-bit Modbus registers. It can be displayed in 4 different word/byte orders.

Signed integer Big-endian
Signed integer Little-endian
Signed integer Big-endian byte swap
Signed integer Little-endian byte swap

Example

Byte Order: AB CD (Big-endian)
The decimal number 123456789 or in hexadecimal 07 5B CD 15
Order as they come over the wire in a Modbus message: 07 5B CD 15

7.3. 32-bit unsigned integer

This combines 2 16-bit Modbus registers. It can be displayed in 4 different word/byte orders.

Unsigned integer Big-endian
Unsigned integer Little-endian
Unsigned integer Big-endian byte swap
Unsigned integer Little-endian byte swap

Example

Byte Order: AB CD (Big-endian)
The decimal number 123456789 or in hexadecimal 07 5B CD 15
Order as they come over the wire in a Modbus message: 07 5B CD 15

7.4. 64-bit signed integer

This combines 4 16-bit Modbus registers. It can be displayed in 4 different word/byte orders.

Signed integer Big-endian
Signed integer Little-endian
Signed integer Big-endian byte swap
Signed integer Little-endian byte swap

Example

Byte Order: AB CD EF GH (Big-endian)
The decimal number -1,234,567,890,123,456,789 or in hexadecimal EE DD EF 0B 82 16 7E EB
Order as they come over the wire in a Modbus message: EE DD EF 0B 82 16 7E EB

7.5. 64-bit unsigned integer

This combines 4 16-bit Modbus registers. It can be displayed in 4 different word/byte orders.

Unsigned integer Big-endian
Unsigned integer Little-endian
Unsigned integer Big-endian byte swap
Unsigned integer Little-endian byte swap

Example

Byte Order: AB CD EF GH (Big-endian)
The decimal number 1,234,567,890,123,456,789 or in hexadecimal 11 22 10 F4 7D E9 81 15
Order as they come over the wire in a Modbus message: 11 22 10 F4 7D E9 81 15

7.6. 32-bit floating

This combines 2 16-bit Modbus registers. It can be displayed in 4 different word/byte orders.

Float Big-endian
Float Little-endian
Float Big-endian byte swap
Float Little-endian byte swap

Example

Byte Order: AB CD (Big-endian)
The floating point number 123456.00 or in hexadecimal 47 F1 20 00
Order as they come over the wire in a Modbus message: 47 F1 20 00

7.7. 64-bit double

This combines 4 16-bit Modbus registers. It can be displayed in 4 different word/byte orders.

Double Big-endian
Double Little-endian
Double Big-endian byte swap
Double Little-endian byte swap

Example

Byte Order: AB CD EF GH (Big-endian)
The floating point number 123456789.00 or in hexadecimal 41 9D 6F 34 54 00 00 00
Order as they come over the wire in a Modbus message: 41 9D 6F 34 54 00 00 00

8. Save/Open Workspace

If you open many related Modbus windows it is convenient to save a snapshot of the current layout of all open and arranged Modbus Windows in one workspace.

A workspace (*msw) is a file that contains display information and file names of all open windows. Not the actual contents. To do this, go to File→Save Workspace.

The Connection and Chart settings are stored in the Workspace file.

When you open a workspace file, Modbus Slave opens all Modbus Windows and displays them in the layout that you saved.

9. Communication traffic

Select the menu Display→Communication to show the traffic on the serial line or Ethernet cable. Use the stop button to temporary stop the update for inspection.

Use the copy button to copy the selected line to the clipboard.

Modbus Communication Traffic

This window shows only data sent and received by Modbus Slave. You can’t use it as a data sniffer.

Leave this window open while doing other commands.

10. OLE/Automation

Automation (formerly known as OLE Automation) makes it possible for one application to manipulate objects implemented in another application.

An Automation client is an application that can manipulate exposed objects belonging to another application. This is also called an Automation controller.

An Automation server is an application that exposes programmable objects to other applications. Modbus Slave is an automation server.

That means you can use any program that supports VBA (Visual Basic for Applications) such as Visual Basic, Excel etc. to interpret and show the modbus data according to your specific requirements.

10.1. Excel example

You should display the Developer tab or run in developer mode when you want to write macros.

10.1.1. Excel 2007

Excel developer tab

Click the Microsoft office button and then click Excel options.
Click popular and then select the show Developers tab in the ribbon check box.
Note the ribbon is part of the Microsoft fluent user interface.

10.1.2. Excel 2010, 2016

Click on the file tab.
Click options. Excel Options window will open.
On the left pane click Customize Ribbon.
On the right pane, under Main Tabs, check the Developer check box.
Click OK. The Developer tab should now show in the ribbon (right most tab).

10.1.3. Excel sample code

This example opens a window simulating Holding registers.
Modbus Slave is hidden but you can show it by uncomment the "ShowWindow" line. This will show one of the windows.

An example is also included with the Modbus Slave installation.
Start → All Programs → Modbus Slave → Excel Example

Excel VBA Example

Public doc As Object
Public app As Object
Dim status As Integer
Dim n As Integer

Private Sub StartSlave_Click()
   ' Create an application object. You can only create 1 application object
   Set app = CreateObject("Mbslave.Application")

   ' Create a new Modbus Slave document (Data Window)
   ' This is the same as open a new data window in Modbus Slave
   ' You can create up to 50 Modbus Slave documents (Data Window)
   Set doc = CreateObject("Mbslave.Document")

   ' Show Modbus Slave
   ' res = doc.ShowWindow()

   ' Create doc2 if needed.
   ' Set doc2 = CreateObject("Mbslave.Document")

   ' Set one of 5 connection types.
   app.Connection = 1 ' Modbus TCP/IP

   ' TCP/IP settings.
   ' No need to set IP address. We listen to any address. (Default).
   app.ServerPort = 502
   app.IPVersion = 4

   ' Open the connection.
   res = app.OpenConnection()
   Range("D5").Value = res

   res = doc.SetupHoldingRegisters(1, 100, 8)
   doc.SRegisters(0) = 1     ' Modbus address 100
   doc.SRegisters(1) = -10   ' Note that the Index used counts from 0
   doc.URegisters(2) = 50000 ' no matter the Modbus address used.
   doc.URegisters(3) = 60000
   doc.Longs(4) = 10000      ' A long takes 2 registers
   doc.Floats(6) = 123.45    ' A float takes 2 registers
   ' Now a master can read 8 Holding registers with a mix of 3 data types

End Sub

10.2. Python example

This Python example opens a window and set all possible data formats.

Python Example

import win32com.client as win32

SIGNED = 0
UNSIGNED = 1
HEX = 2
BINARY = 3
FLOAT_LE_BS = 4
FLOAT_BE = 5
DOUBLE_LE_BS = 6
DOUBLE_BE = 7
S32_LE_BS = 8
S32_BE = 9
FLOAT_LE = 10
FLOAT_BE_BS = 11
DOUBLE_LE = 12
DOUBLE_BE_BS = 13
S32_LE = 14
S32_BE_BS = 15

U32_BE = 17
U32_LE_BS = 18
U32_BE_BS = 19
U32_LE = 20

S64_BE = 21
S64_LE_BS = 22
S64_BE_BS = 23
S64_LE = 24

U64_BE = 25
U64_LE_BS = 26
U64_BE_BS = 27
U64_LE = 28

#Endianness
BE = 0
LE = 3
BE_BS = 2
LE_BS = 1

App = win32.Dispatch('Mbslave.Application')

App.Connection = 1
App.IPAddress = "127.0.0.1"

App.ServerPort = 502
App.OpenConnection

#Create a Modbus display window called Win1
Win1 = win32.Dispatch("Mbslave.Document")

# Setup 100 holding registers with slave ID 1, address 0 (40001)
Win1.SetupHoldingRegisters(1, 0, 100)
# Show the Modbus window
Win1.ShowWindow()
# Show 20 rows
Win1.Rows(1)

# Disable refresh for speed
Win1.EnableRefresh = False

# Set all different formats
# This sets how the value is displayed
# Use ByteOrder to set the actual endianness
Win1.SetFormat(0, SIGNED)
Win1.SetFormat(1, UNSIGNED)
Win1.SetFormat(2, HEX)
Win1.SetFormat(3, BINARY)

Win1.SetFormat(4, S32_BE)
Win1.SetFormat(6, S32_LE)
Win1.SetFormat(8, S32_BE_BS)
Win1.SetFormat(10, S32_LE_BS)

Win1.SetFormat(12, U32_BE)
Win1.SetFormat(14, U32_LE)
Win1.SetFormat(16, U32_BE_BS)
Win1.SetFormat(18, U32_LE_BS)

Win1.SetFormat(20, S64_BE)
Win1.SetFormat(24, S64_LE)
Win1.SetFormat(28, S64_BE_BS)
Win1.SetFormat(32, S64_LE_BS)

Win1.SetFormat(40, U64_BE)
Win1.SetFormat(44, U64_LE)
Win1.SetFormat(48, U64_BE_BS)
Win1.SetFormat(52, U64_LE_BS)

Win1.SetFormat(60, FLOAT_BE)
Win1.SetFormat(62, FLOAT_LE)
Win1.SetFormat(64, FLOAT_BE_BS)
Win1.SetFormat(66, FLOAT_LE_BS)

Win1.SetFormat(80, DOUBLE_BE)
Win1.SetFormat(84, DOUBLE_LE)
Win1.SetFormat(88, DOUBLE_BE_BS)
Win1.SetFormat(92, DOUBLE_LE_BS)

# Set all Names to used format
Win1.SetName(0, "SIGNED")
Win1.SetName(1, "UNSIGNED")
Win1.SetName(2, "HEX")
Win1.SetName(3, "BINARY")

Win1.SetName(4, "S32_BE")
Win1.SetName(6, "S32_LE")
Win1.SetName(8, "S32_BE_BS")
Win1.SetName(10, "S32_LE_BS")

Win1.SetName(12, "U32_BE")
Win1.SetName(14, "U32_LE")
Win1.SetName(16, "U32_BE_BS")
Win1.SetName(18, "U32_LE_BS")

Win1.SetName(20, "S64_BE")
Win1.SetName(24, "S64_LE")
Win1.SetName(28, "S64_BE_BS")
Win1.SetName(32, "S64_LE_BS")

Win1.SetName(40, "U64_BE")
Win1.SetName(44, "U64_LE")
Win1.SetName(48, "U64_BE_BS")
Win1.SetName(52, "U64_LE_BS")

Win1.SetName(60, "FLOAT_BE")
Win1.SetName(62, "FLOAT_LE")
Win1.SetName(64, "FLOAT_BE_BS")
Win1.SetName(66, "FLOAT_LE_BS")

Win1.SetName(80, "DOUBLE_BE")
Win1.SetName(84, "DOUBLE_LE")
Win1.SetName(88, "DOUBLE_BE_BS")
Win1.SetName(92, "DOUBLE_LE_BS")

# Set different values
Win1.SRegisters(0, -100)
Win1.SRegisters(1, 100)
Win1.URegisters(2, 43690)
Win1.URegisters(3, 65535)

Win1.ByteOrder = BE
Win1.Ints_32(4, -123456)
Win1.ByteOrder = LE
Win1.Ints_32(6, -123456)
Win1.ByteOrder = BE_BS
Win1.Ints_32(8, -123456)
Win1.ByteOrder = LE_BS
Win1.Ints_32(10, -123456)

Win1.ByteOrder = BE
Win1.UInts_32(12, 123456)
Win1.ByteOrder = LE
Win1.UInts_32(14, 123456)
Win1.ByteOrder = BE_BS
Win1.UInts_32(16, 123456)
Win1.ByteOrder = LE_BS
Win1.UInts_32(18, 123456)

Win1.ByteOrder = BE
Win1.Ints_64(20, -123456)
Win1.ByteOrder = LE
Win1.Ints_64(24, -123456)
Win1.ByteOrder = BE_BS
Win1.Ints_64(28, -123456)
Win1.ByteOrder = LE_BS
Win1.Ints_64(32, -123456)

Win1.ByteOrder = BE
Win1.UInts_64(40, 123456)
Win1.ByteOrder = LE
Win1.UInts_64(44, 123456)
Win1.ByteOrder = BE_BS
Win1.UInts_64(48, 123456)
Win1.ByteOrder = LE_BS
Win1.UInts_64(52, 123456)

Win1.ByteOrder = BE
Win1.Floats (60, 123.456)
Win1.ByteOrder = LE
Win1.Floats (62, 123.456)
Win1.ByteOrder = BE_BS
Win1.Floats(64, 123.456)
Win1.ByteOrder = LE_BS
Win1.Floats(66, 123.456)

Win1.ByteOrder = BE
Win1.Doubles(80, 123.456)
Win1.ByteOrder = LE
Win1.Doubles(84, 123.456)
Win1.ByteOrder = BE_BS
Win1.Doubles(88, 123.456)
Win1.ByteOrder = LE_BS
Win1.Doubles(92, 123.456)

# Refresh
Win1.EnableRefresh = True

Win1.ResizeAllColumns ()
Win1.ResizeWindow()

print (Win1.GetName(1))

_ = input("Press ENTER to quit:")

10.3. Connection Functions/Properties

The following properties and functions do the same as you setup in the connection dialog (F3).

10.3.1. Connection

Connection selects the desired connection. A serial port or one of the Ethernet connections can be selected.

Property Connection as Integer

Valid values: 0 = Serial port
1 = Modbus TCP/IP
2 = Modbus UDP/IP
3 = Modbus RTU over TCP/IP
4 = Modbus RTU over UDP/IP

Example

Connection = 0