Setting The Baud Rate - Contec COM-2PD-LPE User Manual

4. Functions

Setting the Baud Rate

The output baud rate can be set by setting the software.
Baud rate: 30 - 921,600 bps
However, when the result contains a fractional part in the calculation of the division register listed
below, since the division register value is rounded down to the nearest integer,a setting error of the baud
rate occurs.
921600 ÷Desired baud rate = Division register setting value
Ex.) 921600 ÷ 9600bps = 96
921600 ÷ 128000bps = 7.2....
Refer to the following baud rate setting examples.
Table 4.1. Baud Rate Generator Programming Table
Output baud rate [bps]
Setup error (%)
30
50
75
110
134.5
150
300
600
1200
1800
2000
2400
3600
4800
7200
9600
14400
19200
28800
38400
57600
76800
115200
153600
230400
460800
921600
CAUTION
As Visual Basic's communication control (MSComm) accepts any available baud rate settings,
using the MSComm functionalities limits the rate to 115,200bps maximum. For setting the baud
rate higher than 115,200bps using Visual Basic, refer to the VB sample program included in the
accompanying CD-ROM "Standard COM Driver Software COM Setup Disk".
32
(As the result is an integer, a setup error does not occur.)
(As the result contains a fractional part, a setup error occurs.)
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0.026
0.058
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0.680
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COM-2PD-LPE