Feb'09 News flash

Quick-start

This free protocol simulator was originally designed to allow testing of modbus master devices over serial, hence the name: Why is it called MOD_RSSIM? Because it started out as a modbus RS232 simulator - but it grew as all applications do, and even after adding TCP/IP support and the name stuck. MOD_RSSIM also allows itself to be used as a "virtual" PLC for comms testing, training and limited use as a source-code resource. Please download it to try it out, if it works for you, about 45 minutes later you will get a nag-screen, either mail me, or use my free registration-key request screen at the bottom of the page

An intuitive if not simple user-interface is my goal, next I will try guide you through how to use the simulator.

• The built-in help engine starts when you hit the universal "F1" key. You will need to have a default web-browser installed (no internet needed) to view the help.
• Setting up the simulation for use will cover it's configuration for different applications in detail. The first point we come to however is which media type the simulation should use.
• Screenshot showing Allen-Bradley MASTER protocol emulating a continuous coal miner. Selecting a different protocol opens up new options for setting up each protocol as relevant.

• Please follow the website menus to more information, like the FAQ and Help.

1. Download the simulator.
2. Run it, and select TCP/IP or serial protocol.
3. If you want serial, you can try using com0com (see the links page) to create a local loopback, and no need for a serial cable.
4. Select your serial port from the settings dialog (or if TCP/IP, simply point your HMI/SCADA to the local IP address) and connect.
5. Next you can click on the "Comms" button in the bottom-right to see the state of the communication link to see if your master is trying to connect and talk to the simulator already.
6. Now go and look at your scada/hmi, if it's not already talking, go into your drivers and make sure they are started (in most cases no license will be needed from modbus protocol in your scada simply because it is so popular for verification), and if still not talking, look at your own communication logs.
7. Unless you are doing something wrong, you should have zeroed values in the SCADA. Now for some fun..
8. ...more steps to follow.
   

Contact/Registration

  Registration Key here: the key merely gets rid of the nag screen, click on the link to get it. It does not enable new features.

1. Download the file
2. Run it (Ignore the warning about this being unsafe)
   
3. Run the program
4. Enjoy
   

Support : If you have questions, comments or bugs to report, please fill in the form and ask your question in the comments field.