DTL-DB10-6 View Datasheet(PDF) - Murata Manufacturing

Part Name

Description

Manufacturer

DTL-DB10-6

Interface Board for Serial-Input Electronic Loads

Murata Manufacturing 

DTL-IFB-485

Interface Board for Serial-Input Electronic Loads

Figure 8. Terminal: Properties Settings

5. From the terminal window, select File and then

Properties (see Figure 8). Select the Settings tab. Set

Terminal Keys on, Emulation to Auto Detect, Backscroll

Buffer lines to 500 (all these may be default values).

Under ASCII settings (see Figure 9), set Send line ends

with line feeds on, and echo typed character locally on,

line delay 0 and character delay 0. Under ASCII receiving

set Append Line Feeds to Incoming Line Ends on, force 7

bit ASCII off and line wrap on. Select the O.K. button and

from the terminal window select exit (File/exit) or the top

right corner X button (i.e. exit the application).

6. At the terminal screen, you can type in any of the DTL-

IFB-485 commands e.g. A000_?V and the response should

return from the board. Next time you run HyperTerminal, you

can just click on the “9600 Dumb.ht” icon to run the terminal

emulation program with all your pre-selected settings.

7. HyperTerminal has an anomality in its' set up feature. If you

cannot establish communication with the DTL-IFB-485 after

you have followed all the preceding steps, proceed as follows:

Enable HyperTerminal’s status bar by clicking on the View

menu. If you see “Connected 0:03:33” followed by “Auto

Detect” and a second box also displaying “Auto Detect”, you

will have a problem. The second box should display the

connection speed (assume 9600 Baud) as 9600 8-N-1 (see

Figure 10), but despite entering all this data in the

HyperTerminal setup, the program is so hyper-intelligent, that

it prefers to ignore it and auto detect the baud rate from the

responding device.

Figure 10. Status Bar: 9600 8-N-1

This "auto-detection of HyperTerminal", requires the

responding device to send a carriage return. This might

work well with modem handshakes, but it doesn’t work with

the DTL-IFB-485, which doesn’t emit any carriage returns

until it is spoken to at the right speed. Surprisingly, there is

no way to suppress this auto detecting of the baud rate from

the configuration menus. To get round this problem, remove

the connector from the DTL-IFB-485 and jumper pin 4 to 8

and 5 to 7 on the connector.

Figure 9. Terminal: Properties Settings-ASCII

You will receive a "You are currently connected" prompt “Do

you want to save session 9600 Dumb?” (or whatever name

you gave it). Respond by clicking yes. You will exit to the

HyperTerminal window and should see an icon with “9600

Dumb.ht” under it (see Figure 3). Clicking on it will start

HyperTerminal up with all the settings that we have entered.

The reason for exiting and re-starting HyperTerminal is that it

does not seem to pick up all the configuration settings unless

you do it this way.

10

Figure 10. Status Bar: 9600 8-N-1

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