Model 75A250A
Manual Text
2-7
REV A
2.2.2 Remote Operation
(continued)
2.2.2.7
RS-232 Communications
(continued)
Table 2-3
RS-232 Connector Pin-Outs
Pin No.
Signal
Data Direction*
Description
1
DCD
<
Device Carrier Detect
2
RD
<
Receive Data
3
TD
>
Transmit Data
4
DTR
>
Data Terminal Ready
5
GND
N/A
Ground
6
NC
N/A
No Connection
7
RTS
>
Ready To Send
8
CTS
<
Clear To Send
9
NC
N/A
No Connection
*Note:
> = Output from Model 75A250A
< = Input to Model 75A250A
Special Note:
A null modem cable or adapter is required in order to properly interface the
Model 75A250A to a standard serial port on a computer.
Once the RS-232 interface is established, commands are processed in the same manner as that of
the IEEE-488 interface. The command structure is identical, except that there is no EOI line.
Therefore, all commands are terminated with a line feed (<LF>). Since this is a full-duplex
asynchronous interface, if the Model 75A250A detects an error, the error message is immediately
transmitted to the host controller. These error messages are defined in
Table 2-2.
2.2.2.7.1 RS-232 port settings
The RS-232 port settings used for communication with the Model 75A250A are as follows.
Word Length: 8 bits
Stop Bits:
1
Baud Rate:
1200–76,800 (switch-selectable)
Parity: None
2.2.2.8
Remote Commands
The following commands are available to the user for remote communication and operation of the
Model 75A250A. In the descriptions of these commands, a lower-case “x” is used to signify a
numeric value or parameter.
Содержание 75A250A
Страница 20: ...Model 75A250A Manual Text 4 1 REV...
