Scientech S310 Vector User Manual

Page 37

Remote Interface Language:

The remote interface language for the S310 is compatible with Std-IEEE488.2 and it also works with the RS-
232 remote interface.

1. RS-232 Connector:

The RS-232 connector is a 9 pin subminiature connector on the instrument rear panel. The pin out and pin
descriptions are shown below:

Pin 1

Unused

Pin 2

Data In (RXD)

Pin 3

Data Out (TXD)

Pin 4

DTR (is generated)

Pin 5

Ground

Pin 6

DSR (is ignored)

Pin 7

RTS (is marking)

Pin 8

CTS (is evaluated if requested)

Pin 9

Unused

2. RS-232 Specifications:

Type:

EIA-RS232C

Method: Half-duplex,

Asynchronous

Transmission:

Bi-directional

Format:

300, 1200, 2400, 9600, 19200 baud rate selectable

Data bits:

Parity bit:

Even, Odd, or None

Stop bit:

Code:

ASCII

Total no. of bits:

* The start bit counts for the first bit. Therefore, if you choose no parity you must have 2 stop bits.

3. Remote Interface Language Syntax:

Remote interface messages consist of zero or more commands or queries, separated by semicolons and
terminated by a linefeed (IEEE488) or a carriage return (RS232). A command or query consists of a command
or query header followed by zero or more arguments separated by commas. Messages must be less than 75
characters.

Example:

cmd1 arg1;cmd2arg1,arg2;...cmdN arg1

The queries RPT?, SND?, COL?, and *OPC?, and the commands COL and *OPC are intended to be placed as
the last command in the message. Placing them elsewhere will not result in harm to the instrument, but it may
produce results which seem unusual.

Queries which have not finished will be aborted by the receipt of additional commands or queries. This will
result in Query Errors in the IEEE488 interface. If a RPT?, COL?, or SND? query is immediately followed by
another command, it is likely that no data will be transmitted. If COL is followed by another command,
statistics gathering will be halted unless the command *WAI appears between the two commands.