QuadTech 1865, Инструкция по эксплуатации, Страница: 67 / 87

Operation Page 67 of 87
INPUT #2, y
IF y THEN
PRINT #1, "spoll 04"
INPUT #2, x
END IF
WEND
PRINT #1, "output 04;fetc?"
'request data
PRINT #1, "enter 04" 'get data
INPUT #2, c$
PRINT c$
PRINT #1, "output 04;system:lock 0"
'enable front panel
PRINT #1, "local"
END
2.7.5 RS232 Interface
The 1865 instrument comes standard with an RS232 serial port interface, available
through a connector (9 pin) on the rear panel of the instrument, for connecting to a PC.
The RS232 standard defines electrical specifications for the transmission of bit serial
information. The use of the RS232 port requires five lines: receive data, transmit data,
data terminal ready, data set ready and signal ground. With some controllers additional
signals maybe required and are listed in Table 2-6. Refer to Figure 2-34 for null modem
cable configuration to the standard db9 or db25 connector. Refer to Table 2.5 for the
command set which also applies to the RS232 interface. When using the RS-232
interface with a printer the IEEE-488 Mode must be set to
Talk and the State to Disable .
Table 2-6: RS232 Interface Connections
Signal Name Pin Number
Function
Input:
DCD 1 Data Carrier Detect
DSR 6 Data Set Ready
RXD 2 Receive Data
CTS 8 Clear to Send
RI 9 Ring Indicator
Outputs:
RTS 7 Request to Send
TXD 3 Transmit Data
DTR 4 Data Terminal Ready
GND 5 Signal Ground