Chapter Four: Operation
How To Communicate via RS-232
47
2. Configure identical communication parameters on the 153/1253 unit and the PC. Table
13 lists the communication parameters and the 153/1253 unit default settings.
RS-232 Communications Settings
Parameter
Settings
Baud Rate
9600
Parity
NONE
Stop Bits
ONE*
Data Bits
EIGHT*
End-of-Line Delimiter
CR
Handshaking
OFF*
* Setting cannot be changed
Table 13: RS-232 Communications Settings
To change the baud rate, parity, or end-of-line delimiter on the 153/1253 unit, you must change
dipswitch settings.
Note
The 153/1253 unit is configured for eight data bits, one stop bit and no
handshaking. You cannot change these settings.
How To Change the Dipswitch Settings
In order to change the communication parameters on the 153/1253 unit, you must change the
dipswitch settings on the motherboard. Table 10, page 35, lists the dipswitch assignments.
1. Unplug the power cord.
Warning
To avoid an electrical shock, disconnect the power cord before
opening the unit.
2. Open the 153/1253 unit to expose the motherboard.
A. 153 Unit: Unscrew the two screws on the top of the unit and lift off the cover.
B. 1253 Unit: Unscrew the four screws on the top of the unit and lift off the cover.
3. Flip switch 5 to the ON position.
This configures the 153/1253 unit for even parity.
Содержание 1253D
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