Diagslave Modbus Slave Simulator

diagslave is a simple command line based Modbus slave simulator and test utility. It is free software. diagslave is using the FieldTalk^™ Modbus driver. Diagslave binaries are available for the following operating system platforms and architectures:

• Windows
• Linux (x86 32-bit)
• QNX Neutrino 6 (x86)

Usage

Usage: diagslave [options] [serialport]
Arguments:
serialport    Serial port when using Modbus ASCII or Modbus RTU protocol
              COM1, COM2 ...                on Windows
              /dev/ttyS0, /dev/ttyS1 ...    on Linux
              /dev/ser1, /dev/ser2 ...      on QNX
General options:
-m ascii      Modbus ASCII protocol
-m rtu        Modbus RTU protocol (default)
-m tcp        MODBUS/TCP protocol
-t #          Master poll time-out in ms (0-100000, 3000 is default)
-a #          Slave address (1-255 for RTU/ASCII, 0-255 for TCP)
Options for MODBUS/TCP:
-p #          TCP port number (502 is default)
Options for Modbus ASCII and Modbus RTU:
-b #          Baudrate (e.g. 9600, 19200, ...) (9600 is default)
-d #          Databits (7 or 8 for ASCII protocol, 8 for RTU)
-s #          Stopbits (1 or 2, 1 is default)
-p none       No parity
-p even       Even parity (default)
-p odd        Odd parity

Usage Examples

To get help on usage run the following command:

diagslave -h

To run a Modbus server on COM1 run:

diagslave -b 19200 -p none -m rtu

To run a Modbus/TCP server on Ethernet run:

diagslave -m tcp

Details

Download	diagslave.2.8.zip
System Requirements	diagslave runs on Windows XP, 2000, NT, 98, Linux kernel 2.6 or 2.4, QNX Neutrino 6 (x86).
License	This program is freeware; you can use it and redistribute it under the terms of the accompanying License document LICENSE-FREE.