National Instruments RMX-410 Series, User Manual

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88
NATIONAL
INSTRUMENTS
7.9 Serial Communication Test Set-Up
Basic set-up to test serial communication operation.
1. Equipment: PC with Windows Hyper Terminal, private edition, software installed, RMX-410x power
supply, RS232 cable.
2. PC set-up:
2.1 Open Hyper Terminal.......................New Connection.
2.2 Enter a name
2.3 Connect to.......................................Direct to Com1 or Com 2
2.4 Configure port properties:
Bits per second .......9600
Data bits ..................8
Parity .......................None
Stop bits....................1
Flow control..............None
2.5 Open Properties in the program File...........................Properties
2.6 Setting: ASCII Set Up
Select Echo characters locally, select send line ends with line feed.
On some PC systems, pressing the number keypad ”Enter” will
distort displayed messages. Use the alphabetic ”Enter” instead.
3. Power supply set-up:
3.1 Connect the power supply to the PC using the RS232 cable.
3.2 Set via the front panel: Baud Rate: 9600, Address: 06, RS232, GEN Language
4. Communication test:
4.1 Model identification:
PC: write: ADR 06
Power supply response: ”OK”
4.2 Command test:
PC write: OUT 1
Power supply response: ”OK”
PC write: PV n (for n values see Table 7-5)
Power supply response: ”OK”
PC write: PC n (for n values see Tables 7-6, 7-7 and 7-8)
Power supply response: ”OK”
The power supply should turn on and the display will indicate the output voltage
and the actual output current.
7.10 SCPI Protocol
NOTE:
Selecting the power supply (INSTrument:NSELect <address>) is necessary before using any other
command.
7.10.1 Data Format
Serial data format is 8 bit, one start bit and one stop bit. No parity bit.
7.10.2 End of Message
End of message is the Carriage Return character (ASCII 13) and the Line Feed (ASCII 10) character.
7.10.3 End of Command
End of command is Carriage Return character (ASCII 13) and/or the Line Feed (ASCII 10) character.