INFICON STM-100/MF Thin Film Deposition Monitor - Manual (Page 57)

STM - 100 / MF
9 PIN MALE
SHIELD
IBM - PC,XT
25 PIN FEMALE
2 RxD
3 TxD
9
5 GND
TxD 2
RxD 3
CTS 5
DSR 6
GND 7
DTR 20
Figure 5.2: Connections for STM-100 / MF to PC Compatible Computers.
After the proper cable is made, make sure the baud rate of the computer and
STM-100 / MF are the same. By setting two of the dip switches on the
CONFIGURATION set of switches, you can set one of four baud rates as shown in
Table 5.1.
The diskette included with this manual contains demonstration software that
will verify the communications connection between a MSDOS based computer and
the STM-100 / MF. The program STMCKOUT.EXE communicates with the STM
via RS232 and will exercise the communication sub system. For more information
of other programs on the diskette refer to Appendix A. Follow the directions in the
next paragraphs to set up the STM for serial communications.
SW6 SW7 BAUD
OFF OFF 300
OFF ON 1200
ON OFF 2400
ON ON 9600
Table 5.1: Baud Rate Configuration Table.
Make sure that the baud rate on your computer is set to the same baud rate.
The STM-100 / MF is shipped from the factory set at 9600 baud. To set an IBM-
PC to the same baud rate, type in:
mode com1:9600,8,n,1 <Enter>
This will set the IBM for 9600 baud, 8 data bits, no parity, and 1 stop bit on its
COM1 port. It is important to use 8 data bits because the communication
protocols use all 8 of them.
Communication Demo
Disk
Setting Baud Rates
COMPUTER INTERFACING Page 5 - 2