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COMPort
The
COMPort
numbers are defined in
(p. 13). COM port numbers in the range of
32 to 47 are reserved for use with the SDM-SIO2R.
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BaudRate
BaudRate
is used to set up the SDM-SIO2R baud rate as you would with any RS-232
interface. The SDM-SIO2R does not support automatic baud rate recognition. Instead,
setting the rate to a negative number sets the automatic flow control system (RTS/CTS).
This system is discussed in greater detail in
Using RTS/CTS and automatic handshaking
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SerialOpenFormat
This parameter sets the data format. It also determines whether the SDM-SIO2R works in
normal RS-232, listen-only RS-232, full-duplex RS-485, or half-duplex RS-485 mode as
defined in the following tables.
Table 6-7: Communications port parameters RS-232
SerialOpenFormat
Parity
No. stop bits
No. data bits
0
None
1
8
1
Odd
1
8
2
Even
1
8
3 (default)
None
1
8
4
Not used
5
Odd
2
8
6
Even
2
8
7
None
2
8
8
Not used
9
Odd
1
7
10
Even
1
7
11
1
None
1
7
12
Not used
13
Odd
2
7
SDM-SIO2R Serial Input/Output Module with Switched Sensor Power
28
