Appendix D: Type 651 Displayless Unit RS-232 Confi
uration
123
Caution
Before opening the unit to change dipswitch settings, you must power
off the unit as a safety precaution. Refer to
Opening/Closing the Type
651 Controller
, page 120. Any new dipswitch settings take effect
when the unit is powered up.
I/O Board Dipswitch Bank and RS-232 Communications Settings
Function Choices Switches
RS-232 Baud Rate 1 2 3 4
The five choices for baud rate are: 300 O C O O
1200 O O C O
2400 O O O C
4800 O C C O
9600 C C C O
RS-232 Parity and Data Bits 5
The two choices for parity checking
are:
Even
7 data bits
O
None
8 data bits
C
Reserved Switches
6
7
Reserved for future use. C C
RS-232 End-of-Line Delimiter 8
The two choices for end-of-line
delimiter are:
CR O
CRLF C
Note: O = Open C = Closed
Table 24: I/O Board Dipswitch Bank and RS-232 Communications Settings