Remote operation, 1 setting up the rs-232 port for remote control – Martel Electronics MC1210 User Manual

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8. Remote Operation

The calibrator can be remotely controlled using a PC terminal, or by a computer program
running the calibrator in an automated system. It uses an RS-232 serial port connection for
remote operation. With this connection the user can write programs on the PC, with Windows
languages like Visual Basic to operate the calibrator, or use a Windows terminal, such as
Hyper Terminal, to enter single commands. Typical RS-232 remote configurations are shown
in Figure 25.

Figure 25. Calibrator-to-Computer Connection

8.1 Setting up the RS-232 Port for Remote Control

Note: The RS-232 connection cable should not exceed 15m unless the load capacitance
measured at connection points is less than 2500pF.

Serial parameter values:

9600 baud

8 data bits

1 stop bit

no parity

Xon/Xoff

EOL (End of Line) character or CR (Carriage Return) or both

To set up remote operation of the calibrator on the Windows Hyper Terminal, connected to a
COM port on the PC as in Figure 23, use the following procedure:

Start Hyper Terminal (located in Accessories/Communications of the Windows Start
menu)

Select New Connection.

For Name enter MC1210. Select the serial port that the unit is connected to.

Enter the above information for port settings.

Select ASCII setup from File/Properties/Settings and mark these choices:

Echo typed characters locally

Wrap lines that exceed terminal width

Optional RS-232 or USB Cable

(See section 10.4)

ENTER

–

HOME

MEASURE / SOURCE

3W
mA+

Loop

+
V

–

4W
mA–

MEASURE

–

COM PORT

USB PORT