MODBUS

Embedded Experts speaks MODBUS.

Add MODBUS functionality to your products

MODBUS is a request/response protocol where multiple functions provide access to standardized services. The standardized services include a predefined data model based on discrete bits and registers suitable for representing analog and digital information. If not sufficient this services can be extended using custom function code and application specific data models.

MODBUS is located at layer 7 of the Open Systems Interconnection (OSI) model. It supports master / slave communication between devices attached on RS485/RS422 or TCP/IP networks. Add MODBUS to your devices with SILA Embedded Solutions MODBUS stacks within a couple of weeks. Our network stacks are fast, portable and easy to integrate. Furthermore the stack is provided with demo applications for numerous platforms. To protect your investment the stack is delivered as ANSI C sourcecode without any runtime royalties and 6 months of free support.

To further reduce integration time we can also integrate our stack into your hardware and software platform. This services is especially suitable such that your engineers can focus on your application specific problem resulting in a faster time to market.

MODBUS Master

Properties

MODBUS RTU/ASCII for RS485/RS422
MODBUS TCP/IP and MODBUS UDP
Parallel operation of MODBUS TCP and RTU/ASCII
Parallel operation of multiple MODBUS RTU/ASCII instances on independent physical interfaces
Standard conforming and easily portable ANSI C source code
Scale from 8Kbyte to 20Kbyte FLASH. Functions can be configured using compile time directives
Low memory requirements of 300-400 Byte for each instance
Simultaneous operation with MODBUS Slave
Supports MODBUS TCP/IP, MODBUS over UDP, MODBUS RTU/ASCII over RS232, RS485/RS422
Supports function codes 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x0F, 0x10, 0x11, 0x14, 0x15, 0x16, 0x17
Custom function codes can easily be added

MODBUS Slave

Properties:

MODBUS RTU/ASCII for RS485/RS422
MODBUS TCP/IP and MODBUS UDP
MODBUS TCP Gateway mode (Requires Master license)
Statistic interface to analyze and log MODBUS requests
Parallel operation of MODBUS TCP and RTU/ASCII
Parallel operation of multiple MODBUS RTU/ASCII instances on independent physical interfaces
Standard conforming and easily portable ANSI C source code
Scale from 8Kbyte to 20Kbyte FLASH. Functions can be configured using compile time directives
Low memory requirements of 300-400 Byte for each instance
Simultaneous operation with MODBUS Master
Supports MODBUS TCP/IP, MODBUS over UDP, MODBUS RTU/ASCII over RS232, RS485/RS422
Supports function codes 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x0C, 0x0B, 0x0F, 0x10, 0x11, 0x16, 0x17, 0x2B
Custom function codes can easily be added

Supported Platforms

Microcontrollers with or without RTOS. Includes demos for AVR, MSP430, PIC32, ARM (Atmel, Freescale, NXP, STM32), 8051 and others
Demos for common RTOS like FreeROTS, uCOS-II, Keil-RTX and others
Supports two serial API versions for byte wise and blockwide processing

Selected example ports:

MODBUS Master MODBUS Slave

Previous Next

Demo application for EE modbus MASTER stack on ATXMEGA-128A4U using ATMELSTUDIO

Description

SOC: ATXMEGA-128A4U
EvalBoard: n/a
Atmel Studio 7.0 / ASF
USARTC0
RTU / MODBUS @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	1

Notes

History

2014-03-09: Created
2020-03-24: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2014-03-09

Demo application for EE modbus MASTER stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega328P
EvalBoard: n/a
Atmel Studio 7.0 / BARE
USART0 and USART1 on PORTC
RTU / RS485 @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	10

Notes

This demo demonstrates one slave instance and one master instance of the stack running simultaneously.

History

2008-12-06: Created
2010-02-28: Updated AVR port to work with ICCAVR.
2010-08-19: Added CodeVision AVR support.
2020-05-04: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-12-06

Demo application for EE modbus MASTER stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega128
EvalBoard: n/a
Atmel Studio 7.0 / BARE
USART on PORTC
RTU / RS485 or RS232 @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	15
1	Input	0x0002	4

Notes

Register 0 is an incrementing counter.
Reads holding register from address 5 - 10, increment them by one and store them at address 10.
Reads the input registers from address 2 - 5 and write them to the holding registers at address 1 - 4.
Led is turned on/off depending on the value of the variable bTurnOn.

History

2007-06-23: Created
2008-09-18: Added configuration file for master/slave demo.
Increased number of software timers.
2008-12-06: Added demo for master/slave stack running at the same time.
2010-02-28: Updated AVR port to work with ICCAVR.
2010-08-19: Added CodeVision AVR support.
2020-05-04: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2007-06-23

Demo application for EE modbus MASTER stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega2561
EvalBoard: n/a
Atmel Studio 7.0 / BARE
USART1
RTU / RS485 @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	15
1	Input	0x0002	4

Notes

History

2007-06-23: Created
2008-09-18: Added configuration file for master/slave demo.
Increased number of software timers.
2008-12-06: Added demo for master/slave stack running at the same time.
2010-02-28: Updated AVR port to work with ICCAVR.
2010-08-19: Added CodeVision AVR support.
2020-05-04: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2007-06-23

Demo application for EE modbus MASTER stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega32
EvalBoard: n/a
Atmel Studio 7.0 / BARE
USART on PORTC
RTU / RS485 or RS232 @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	15
1	Input	0x0002	4

Notes

History

2007-06-23: Created
2008-09-18: Added configuration file for master/slave demo.
Increased number of software timers.
2008-12-06: Added demo for master/slave stack running at the same time.
2010-02-28: Updated AVR port to work with ICCAVR.
2010-08-19: Added CodeVision AVR support.
2020-05-04: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2007-06-23

Demo application for EE modbus MASTER stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega64
EvalBoard: n/a
Atmel Studio 7.0 / BARE
USART on PORTC
RTU / RS485 or RS232 @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	15
1	Input	0x0002	4

Notes

History

2007-06-23: Created
2008-09-18: Added configuration file for master/slave demo.
Increased number of software timers.
2008-12-06: Added demo for master/slave stack running at the same time.
2010-02-28: Updated AVR port to work with ICCAVR.
2010-08-19: Added CodeVision AVR support.
2020-05-04: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2007-06-23

Demo application for EE modbus MASTER stack on LPC-1758 using LPCXPRESSO

Description

SOC: LPC1758
EvalBoard: n/a
LPCXpresso v8.2.2_650 / FreeRTOS
master 1: TCP
master 2: RTU @ 38400 NONE, UART0

Master #	Slave #	Registers	Start	Length
1	192.168.0.200:502	Holding	0x0000	10
2	1	Holding	0x0000	10

Notes

Reads holding register from address 0 - 10 for both masters.
LED0 is a blinking LED.
Make sure to use the Release configuration for this demo.

History

2011-01-02: Created
2014-08-23: Added new lwIP port
2020-06-02: Updated to LPCXpresso v8.2.2_650

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2011-01-02

Demo application for EE modbus MASTER stack on MSP430-F169 using IAR-EW

Description

SOC: MSP430F169
EvalBoard: n/a
IAR Embedded Workbench 8.4
USART0
RTU / MODBUS @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	15
1	Input	0x0002	4

Notes

History

2010-11-28: Created
2020-05-05: Updated to IAR Embedded Workbench 8.4

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-11-28

Demo application for EE modbus MASTER stack on PIC18 using MPLAB-X

Description

SOC: PIC18F45K22
EvalBoard: n/a
MPLAB X IDE v5.35
EUSART on PORTA
ASCII / MODBUS @ 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	15
1	Input	0x0002	4

Notes

History

2008-02-26: Created
2008-04-03: - Added support for disabling the additional API checks.
- Fixed bug with coil/discrete registers.
2020-05-05: Updated to MPLAB X IDE v5.35

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-02-26

Demo application for EE modbus MASTER stack on RENESAS-S5D9 using E2STUDIO

Description

SOC: S5D9
EvalBoard: n/a
e² studio/ ThreadX
UART0
RTU / RS232 or RS485 @ 38400 ODD

Slave #	Registers	Start	Length
1	Holding	0x0000	10

Notes

Using SSP 1.7.5.
Register 0 is an incrementing counter.
Reads holding register from address 0 - 9, increment them by one and store them at their same address.

History

2019-07-11: Created
2020-06-04: Updated to latest verison of e² studio

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2019-07-11

Demo application for EE modbus MASTER stack on STM32-L072 using CUBEMX

Description

SOC: STM32-L072
EvalBoard: STM32-L072
Keil MDK-ARM 5.29 / FreeRTOS
USART4 using DMA
RTU / MODBUS @ 38400 ODD

Slave #	Registers	Start	Length
1	Input	0x0002	4

Notes

Reads the input registers from address 2 - 5

History

2016-08-27: Created
2017-03-07 : Added STM32/CubeMx bugfixes
2020-03-24: Updated to Keil ARM 5.29

Status

Project	Compile	Linking	Tested on Target
OK	1 Warning	OK	2016-08-27

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

Slave #	Registers	Start	Length
1	Input	-	-
1	Holding	-	-

Notes

Multiple demos available
demo-custom.c shows implementation of a custom function code (fc=65)

History

2008-07-20: Created
2008-09-02: Synced with changes from improved Windows and Windows CE port
2009-12-20: - Added new serial mode slow computers.
- Fixed porting layer so that it works with master/slave at same time.
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-07-20

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
Master 1: RTU / MODBUS @ 19200 NONE, COM2, Slave address : 1
Master 2: RTU / MODBUS @ 38400 NONE, COM5, Slave address : 1

Master #	Registers	Start	Length
1	Holding	0x0000	2
2	Holding	0x0000	2

Notes

Multiple demos available
demo-multi.c demonstrates two instances of the stack running simultaneously.
Holding register 0 for both masters is an incrementing counter
Reads holding register 1 for both masters

History

2008-07-20: Created
2008-09-02: Synced with changes from improved Windows and Windows CE port
2009-12-20: - Added new serial mode slow computers.
- Fixed porting layer so that it works with master/slave at same time.
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-07-20

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
master 1: TCP 127.0.0.1:502
master 2: RTU @ 19200 NONE, COM1

For both masters:	Slave #	Registers	Start	Length
1	Holding	0x0000	2

Notes

Multiple demos available
demo-tcp-multi.c shows running both TCP and RTU in parallel in the same application
Holding register 0 for both masters is an incrementing counter
Reads holding register 1 for both masters

History

2008-10-29: Created
2008-09-02: Synced with changes from improved Windows and Windows CE port
2009-12-20: - Added new serial mode slow computers.
- Fixed porting layer so that it works with master/slave at same time.
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-10-29

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP master : 213.129.231.174:502

Slave #	Registers	Start	Length
1	Holding	0x0000	1

Notes

Multiple demos available
demo-tcp-single.c shows usage of modbus/TCP.
This demo connects/disconnects to the stack 5 times and then disconnects automatically.
Holding register 0 is an incrementing counter

History

2016-06-09: Created
2020-05-06: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-06-09

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP master : 192.168.3.2:502

Slave #	Registers	Start	Length
1	Holding	0x0000	11

Notes

Multiple demos available.
demo-tcp.c shows usage of modbus/TCP.
This demo connects/disconnects to the stack 5 times and then disconnects automatically.
Holding register 0 is an incrementing counter.
Reads holding register from adress 5 - 10, increment them by one and store them at address 10.

History

2008-10-29: Created
2009-12-20: - Added new serial mode slow computers.
- Fixed porting layer so that it works with master/slave at same time.
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019
Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-10-29

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP master : 127.0.0.1:502

Slave #	Registers	Start	Length
1	Holding	0x0000	11

Notes

Multiple demos available.
demo-tcp2.c shows usage of modbus/TCP.
This demo connects to the stack, achieves 100 poll cycles and then disconnects automatically.
Holding register 0 is an incrementing counter.
Reads holding register from adress 5 - 10, increment them by one and store them at address 10.

History

2009-12-19: Created
2009-12-20: - Added new serial mode slow computers.
- Fixed porting layer so that it works with master/slave at same time.
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019
Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2009-12-19

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

Slave #	Registers	Start	Length
255	Holding	0x0001	10

Notes

Multiple demos available
demo-udp.c shows usage of MODBUS/UDP protocol
This demo connects to the stack, achieves 5 poll cycles and then disconnects automatically.
Holding register 1 is an incrementing counter
Reads holding register from adress 5 - 10, increment them by one and store them at address 10.

History

2011-11-17: Created
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2011-11-17

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
COM7
RTU @ MODBUS 19200 NONE

Slave #	Registers	Start	Length
1	Holding	0x0000	26
1	Input	0x0002	4

Notes

Multiple demos available
This README is for demo.c project
Holding register 0 is an incrementing counter
Reads the input registers from address 2 - 5 and writes them to the holding registers at address 1 - 4
Reads holding register from adress 5 - 25, increment them by one and store them at address 10

History

2008-06-08: Created
2008-09-02: Synced with changes from improved Windows and Windows CE port
2009-12-20: - Added new serial mode slow computers.
- Fixed porting layer so that it works with master/slave at same time.
2015-06-14: Added new WIN32 port with improved performance
2020-05-06: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-10-29

Demo application for EE modbus MASTER stack on X86-64 using VS2019

Description

SOC: n/a ( WIN32 )
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP master : 127.0.0.1:503

Slave #	Registers	Start	length
255	Holding	0x0001	10

Notes

This demo shows usage of MODBUS/UDP protocol using Dynamic Link Library ( DLL ).
This demo connects to the stack, achieves 5 poll cycles and then disconnects automatically.
Holding register 1 is an incrementing counter
Reads holding register from adress 5 - 10, increment them by one and store them at address 10.

History

2020-06-02: Created

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	-

Demo application for EE modbus SLAVE stack on ATXMEGA-128A4U using ATMELSTUDIO

Description

SOC: ATXMEGA-128A4U
EvalBoard: n/a
Atmel Studio 7.0 / AFS
USARTC0 and PORTC 2/3
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0000	16
Holding	0x0000	16

Notes

Holding register 0x0000 will be reset to 0 if written, others keep their values.
Input registers 0x0000 contains 0x4545, others will contain 0x0000.

History

2014-03-09: Created
2020-03-24: Updated to Atmel Studio 7.0

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2014-03-09

Demo application for EE modbus SLAVE stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega168
EvalBoard: n/a
Atmel Studio 7.0
USART on PORTB
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2010-08-19: Created
2020-04-21: Updated to Atmel Studio 7.0
Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-08-19

Demo application for EE modbus SLAVE stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega2560
EvalBoard: Arduino Atmega2560
Atmel Studio 7.0
USART on PORTB
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2020-04-23: Created

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2020-04-23

Demo application for EE modbus SLAVE stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega2561
EvalBoard: n/a
Atmel Studio 7.0
USART on PORTA
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2020-04-23: Created

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2020-04-23

Demo application for EE modbus SLAVE stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega32
EvalBoard: n/a
Atmel Studio 7.0
USART on PORTA
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2010-08-19: Created
2020-04-21: Updated to Atmel Studio 7.0
Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-08-19

Demo application for EE modbus SLAVE stack on AVR-ATMEGA using ATMELSTUDIO

Description

SOC: AVR_ATmega644P
EvalBoard: n/a
Atmel Studio 7.0
USART on PORTA
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2010-08-19: Created
2020-04-21: Updated to Atmel Studio 7.0
Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-08-19

Demo application for EE modbus SLAVE stack on KE06 using KDS

Description

SOC: MKE06Z128VLK4
EvalBoard: NXP FRDM-KE06Z
Kinetis Design Studio 3.X / FreeRTOS
PE UART
RTU / RS485 @ 38400 odd / Slave address : 1

Registers	Start	Length
Input	0x0000	32
Holding	0x0000	32

Notes

On startup a new thread defined in modbus.cpp is started.
It creates a new instance of a subclass of mbrtuslave. The subclass
implements the appropriate register callbacks which are called whenever
a MODBUS master reads or writes a specific set of registers. The
default implementation return an exception.
For adapting to a specific platform the following steps have to be
taken :
- mbportserial.c: If required add direction pin control for the RS485
  driver enable pin. The demo already contains this and the pin is
  mapped to PTE5.
- mbportserial.c: The function uses the port argument
  to initialize the appropriate serial device.

History

2019-07-14: Created
2019-12-29:
- Fixed bug with 7 databits
- Fixed bug with return value in timer callback missing
- Fixed missing return value in poll
- Update PE Components to Components

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2019-07-14

Demo application for EE modbus SLAVE stack on LPC-1758 using LPCXPRESSO

Description

SOC: LPC1758
EvalBoard: n/a
LPCXpresso v8.2.2_650 / FreeRTOS
TCP slave 1 : 0.0.0.0:502
RTU slave 2: UART1 / @ 38400 NONE / Slave address : 1

Registers	Start	Length
Holding	0x0200	3
Input	0x0100	16

Notes

Input register 0 is an incrementing counter.
LED0 is a blinking LED.

History

2010-12-19: Created
2014-08-18: Merged with new lwIP port supporting TCP keepalive
2020-06-05: Updated to LPCXpresso v8.2.2_650

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-12-19

Demo application for EE modbus SLAVE stack on MSP430-F169 using IAR-EW

Description

SOC: MSP430F169
EvalBoard: n/a
IAR Embedded Workbench 8.4
USART0
RTU / MODBUS @ 38400 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.

History

2008-09-21: Created
2020-04-24: Updated to IAR Embedded Workbench 8.4

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2008-09-21

Demo application for EE modbus SLAVE stack on PIC18-F45K22 using MPLAB-X

Description

SOC: PIC18F45K22
EvalBoard: n/a
MPLAB X IDE v5.35
EUSART on PORTA
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2010-12-08: Created
2010-12-27: Updated Configuration Bits and Project file.
2020-04-24: Updated to MPLAB X IDE v5.35

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-12-08

Demo application for EE modbus SLAVE stack on PIC18-F8722 using MPLAB-X

Description

SOC: PIC18F8722
EvalBoard: n/a
MPLAB X IDE v5.35
EUSART on PORTA
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when holding register 1 has a value > 0.

History

2010-12-08: Created
2010-12-27: Updated Configuration Bits and Project file.
2020-04-24: Updated to MPLAB X IDE v5.35

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-12-08

Demo application for EE modbus SLAVE stack on PIC32-MX using MPLAB-X

Description

SOC: PIC32MX795F512L
EvalBoard: n/a
MPLAB X IDE v5.35
UART2
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Discrete and Input registers are mirrored.
Led 0 is turned on/off when bTurnOn variable has a value > 0.

History

2010-11-14: Created
2020-04-27: Updated to MPLAB X IDE v5.35

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2010-11-14

Demo application for EE modbus SLAVE stack on PIC32-MX using MPLAB-X

Description

SOC: PIC32MX795F512L
EvalBoard: n/a
MPLAB X IDE v5.35 / FreeRTOS
Gateway
- Master : UART2 / RTU / MODBUS @ 38400 NONE
- Slave : TCP / Slave address : 0.0.0.0 : 502

Registers	Start	Length
Input	0x0100	32
Holding	0x0200	32

Notes

Led is regularily toggled. Device acts as gateway.

History

2011-05-01: Created
2012-06-21: Made locking works with interrupt priorities
2020-04-27: Updated to MPLAB X IDE v5.35

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2011-05-01

Demo application for EE modbus SLAVE stack on STM32-F429ZI using ZEPHYR

Description

SOC: STM32F429ZI
EvalBoard: NUCLEO-STM32F429ZI
Zephyr SDK
USART6 using IRQ
RTU @ 19200 EVEN / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	16

Notes

Install Zephyr-SDK using:
https://docs.zephyrproject.org/latest/getting_started/

Compile with:
west build -p auto ./

Flash with:
west flash

Running on other boards:
change set(BOARD nucleo_f429zi) in CMakeLists.txt to your board
change prj.conf for UART support on the new board
change port/mbportserial.c:86 to the correct UART label

History

2020-09-25: Created

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2020-09-25

Demo application for EE modbus SLAVE stack on STM32-L072 using CUBEMX

Description

SOC: STM32L072
EvalBoard: n/a
Keil MDK-ARM 5.29 / FreeRTOS
USART4 using DMA
RTU / ASCII @ 38400 ODD / Slave address : 1

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	16

Notes

Please use ARM Compiler Toolchain V4.0.677 or later!
The project is reinitialized when a 0 value is written in holding register 0.

History

2016-08-27: Created
2017-03-07 : Added STM32/CubeMx bugfixes
2020-03-24: Updated to Keil ARM 5.29

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-08-27

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
COM1
RTU / MODBUS @ 19200 NONE / Slave address : 1
Implements a custom function code

Registers	Start	Length
-	-	-

Notes

Multiple demos available
demo-custom.c shows implementation of a custom function code (fc=65)

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-03-18: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
COM8
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	128
Holding	0x0200	128
Coils	0x0000	16

Notes

Multiple demos available
demo-diag.c implements MODBUS Diagnostics (fc=0x08)
Input Register 0 is an incrementing counter

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-03-18: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP slave 1: 127.0.0.1:501
RTU slave 2: COM1 / RS232 @ 19200 NONE / Slave address : 1

For both slaves:	Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3

Notes

Multiple demos available
demo-multi-tcp-rtu.c shows running a TCP and a RTU in parallel in the same application
Input Register 0 for both slaves are incrementing counters

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-03-18: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP slave 1: 127.0.0.1:501
TCP slave 2: 127.0.0.1:502

For both slaves:	Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3

Notes

Multiple demos available
demo-multi.c demonstrates two instances of the stack running simultaneously.
Input Register 0 for both slaves are incrementing counters

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-03-18: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP slave : 127.0.0.1:502

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Multiple demos available.
demo-tcp-context.c shows using an API extension where you can pass context through the stack
Input register 0 is an incrementing counter.
Discrete and Input registers are mirrored.

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-03-18: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
TCP slave : 0.0.0.0:502

Registers	Start	Length
Input	0x0100	16
Holding	0x0200	3
Discrete	0x0100	16

Notes

Multiple demos available.
demo-tcp.c shows usage of modbus/TCP.
Input register 0 is an incrementing counter.
Discrete and Input registers are mirrored.

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-03-18: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

Demo application for EE modbus SLAVE stack on X86-64 using VS2019

Description

SOC: n/a
EvalBoard: n/a
Visual Studio 2019 / Windows
COM20
RTU / MODBUS @ 19200 NONE / Slave address : 1

Registers	Start	Length
Input	0x0100	128
Holding	0x0200	128
Discrete	0x0100	128

Notes

Multiple demos available.
demo.c shows most basic usage of the stack.
Discrete and Input registers are mirrored.
Input register 0 is an incrementing counter.

History

2016-03-22: Created
2018-06-24: Updated to Visual Studio 2017
2020-04-28: Updated to Visual Studio 2019

Status

Project	Compile	Linking	Tested on Target
OK	OK	OK	2016-03-22

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