Table of contents:

    Section 1.  Overview

   Section 2.  Setting Up the Local “Master” Digi One IA RealPort

   Section 3.  Setting Up the Remote “Slave” Digi One IA RealPort

   Section 4.  Sample PLC Program

Section 1.  Overview 

This document is provided as a supplement to the Digi One IA RealPort Serial to Ethernet Gateway Quickstart Guide supplied by Omron.  The initial setup and configuration of the RealPort is explained in that document.  This document describes specifically how to setup a serial tunnel between 2 Omron devices.  This enables a PLC to send and receive messages to and from another PLC, temperature controller, etc. using the Hostlink or CompoWay/F protocols.  This connection is referred to as a “serial tunnel”.

Section 2.  Setting Up the Local “Master” Digi One IA RealPort.

1.      Install the Digi RealPort Remote software by running Setup.exe on the supplied CD.
     

2.      From the above screen, select your computer Operating System (Currently only Windows NT, 2000, and XP are supported), Hardware (Digi One), and Software (Digi Port Authority – Remote).   Then click Install Software.
 

3.      Select the installation location, and click Next.
  

4.      Select the program folder and click Next.
  

5.      When the installation is complete, click Finish (leave Launch Digi Port Authority – Remote checked)
   

6.      In the above configuration window, click Discover to allow the Digi Port Authority Remote software to search for the connected hardware.
 

7.      The software should report that a device without an IP address has been detected.  Click OK.  If the software did not find the hardware, check the power connection and Ethernet connection to the Digi One IA RealPort device and try the Discover option again.

 8.      In the configuration software, click Configure.

9.      Enter the IP address, Subnet, and Gateway (if applicable) for the hardware.  If uncertain of these parameters, contact your network administrator.  Click OK.  

10.  Wait while the software applies the settings, and tests the device. 

11.  The configuration window will appear again, with the IP address that you entered above in the Device window.  Click Configure and login.  (The default user name is “root” and the default password is “dbps”).

12. Set the Device Type to IA.

13. Set the Baud Rate, Data bits, Parity, and Stop bits to match the setting on the port of the local PLC.  Click Submit.
   

14.  Click Industrial Protocols
   

15.  For the protocol select Hostlink and set the mode to Master.  Click Submit.

16.  Click IA route config...
   

17.  Click Add Destination.
   

18.  Click Unconfigured.
   

19.  Add a Description (optional, but not functionally necessary)

20.  Select Network Destination and enter the IP address of the other Digi One IA RealPort that you wish to communicate with (the one on the other end of the serial bridge)

21.  Select TCP.

22.  Click Advanced.  Click Submit.

23.  Click Admin.  Click Reboot.

Section 3.  Setting Up the Remote "Slave” Digi One IA RealPort

Verify that the Baud Rate, Data Bits, Parity, and Stop Bits match the remote device (For Example: the device attached to the remote Digi One IA RealPort).

Verify that the protocol is set to the appropriate protocol, and that the remote Digi One IA RealPort is set for Slave mode.

NOTE:  The Baud Rate, Data Bits, Parity, and Stop Bits do not have to match on each end of the serial tunnel.  They only have to match the serial device that each Digi One IA RealPort is attached to. (For Example: one PLC could communicate at 19,200 and the other could communicate at 9600).

Section 4.  Example PLC Program

Example CPM2C program to read 10 data memory locations from another PLC every 1 second starting at DM0000 in the remote PLC and storing the received data in DM100 in the local PLC. 

Local CPM2C Hostlink Port Setup

Local CPM2C Data Memory Settings for the Hostlink command to send to the remote PLC.  The data shown represents a Hostlink command to read 1 Data Memory Location starting at DM0000. 

NOTE:  The view is set to ASCII (as shown by the ).  Remember to transfer this data to the PLC.