2.Baud Rate Selection, and
3.Device Selection.
Address Assignment
Use the Address Assignment command to establish unit IDs for each Dolphin HomeBase in your network. This must be done before a unit can be selected for communications.
To establish an Address Assignment:
1. Type or send the escape and command strings to setup the configuration mode and establish the beginning unit ID number:
<ESC>HHP >100 ms< C >100 ms< 1s In
where n is the number representing the first unit in the network
For example, the string <ESC>HHPCI0 would instruct the network to set up ID numbers for all the units in the network beginning at zero (0).
2. The first Dolphin HomeBase in the network receiving the command responds to the host with:
<SYN>
where <SYN> indicates that the command was accepted
3.In sequence, each Dolphin HomeBase will determine its own ID number by adding one to the previous ID number.
4.When ID numbers are established for all HomeBases, the last HomeBase will return this response to the host:
<ACK>n
where <ACK> indicates completion of ID configuration; n represents the ID number for the last unit in the network.
Programmer's Note: When sending ID numbers to the Dolphin HomeBase, remember that numbers typed on the keyboard are ASCII numbers which will be converted to Hex when sent to the Dolphin HomeBase. For example, typing the command from the keyboard:
<ESC>HHP >100ms< C >100ms< 1s I1
would instruct the network to set up ID numbers for each Dolphin HomeBase starting with the ASCII number 1. The first unit in the network would actually receive the number 31 Hex (since ASCII 1 is equal to 31 Hex) as the starting ID number. Each unit in the network would sequentially add one to this starting ID number to establish its own ID. So, for a network of 15 units, the final ID number would be set up as 3F Hex. When the final unit sends back an <ACK>3F, the host computer (which converts Hex data back to ASCII) will then display the ID number as "?" instead of 15 as you might expect.
Baud Rate Selection
The Dolphin HomeBase baud rate is preset to 57600 at the factory. Use the configuration switches on the back panel of the HomeBase to select the network and communications modes for your Dolphin. The following table outlines the configuration switch settings:
Configuration Switch Settings for a HomeBase Network
Switch | Setting | Function |
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2 | FIXED BPS (DOWN) | Baud rate fixed at 9600 |
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2 | FIXED BPS (DOWN) | Baud rate fixed at 9600 |
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When Switch 2 is in the 'PROGRAM' position, the baud rate can be changed using the following procedure or by using the HomeBase Configuration Utility.
Enter or send the escape and command strings:
<ESC>HHP >100ms< 1s Bn
8 - 10 | Dolphin® 7200 User’s Guide |