REMOTE BUS INTERFACE: RS-232
Bus Remote Interface: RS-232
This section provides information on the proper use and configuration of bus remote
interface. The RS-232 remote interface is standard on all 6330 models.
RS-232 Interface
This interface provides all of the control commands and parameter setting commands. All
commands can be found in the command list of this manual.
The RS-232 cabling should be configured as follows for a 9-pin serial port interface:
The COM port should have the following configuration. 9600 baud, 8 data bits, 1 stop
bit, no parity. This interface does not support XON/XOFF protocol or any hardware
handshaking. The controller should be configured to ignore the handshaking lines DTR
(pin 4), DSR (pin 6), CTS (pin 8) and RTS (pin 7). If the port cannot be configured
through software to ignore the lines then the handshake lines should be jumpered together
in two different sets. Pins 4 and 6 jumpered together and pins 7 and 8 jumpered together
at the controller end of the cable.
When sending command over the RS232 bus, the instrument will send a response string
of 06 hex or 6 decimal, the Acknowledge (ACK) ASCII control code if the transfer was
recognized and completed by the instrument. If there is an error with the command string
that is sent, the instrument will respond with 15 hex or 21 decimal, the Not Acknowledge
(NAK) ASCII control code. The ACK or NAK response allows for software
handshaking, to monitor and control data flow. When requesting data from the
instrument, it will automatically send the data back to the controller input buffer. The
controller input buffer will accumulate data being sent from the instrument including the
ACK and NAK response strings, until it has been read by the controller.
RS-232 Interface Command List
The RS-232 bus will automatically send any response back to the controller's input
buffer. Note that the commands are case sensitive and must be typed in capital letters.
Each command string should be terminated by the ASCII control code, New Line <NL>,
or OAh.
The following conventions are used to describe the commands syntax for the 6330.
Braces ({ }) enclose each parameter for a command string. Triangle brackets (< >)
indicate that you must substitute a value for the enclosed parameter. The Pipe ( | ) is used
to separate different parameter options for a command. The command and the parameter
Instrument RS-232 Port PC / Bus Controller
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