Define I/O Lines Command; Set Power-Up States Command; Read Configuration Command - B&B Electronics RS-232 Digital I/O Module 232SDD16 User Manual

Command: !0SO
Argument: {I/O msb}{I/O lsb}
Response: none
ASCII Example: !0SOUA
Dec. Example: !0SO<85><65>
Hex. Example: !0SO <55><41>
Bin. Example: !0SO<01010101><01000001>
Description: the first byte sets output lines #14, 12, 10, & 8 HIGH
and output lines #15, 13, 11, & 9 LOW; the second byte sets output
lines #6, & 0 HIGH and output lines # 7, 5, 4, 3, 2, & 1 LOW. Note: If
any of these lines are defined as inputs the bit settings are ignored.

Define I/O Lines Command

The Define I/O Lines command is used to define each of the 16
I/O lines as either an input or an output. This command requires two
data bytes. Each data byte defines eight I/O lines. The first data
byte defines the eight most significant I/O lines (15 - 8). The second
data byte defines the eight least significant digital I/O lines (7 - 0). If
a bit position is set to a "0" then the I/O line will defined as an input.
If a bit position set to a "1" then the I/O line will be defined as an
output.
Command: !0SD
Argument: {I/O msb}{I/O lsb}
Response: none
ASCII Example: !0SDUA
Dec. Example: !0SD<85><65>
Hex. Example: !0SD<55><41>
Bin. Example: !0SD<01010101><01000001>
Description: the first byte define I/O lines #14, 12, 10, & 8 as
outputs and I/O lines #15, 13, 11, & 9 as inputs; the second byte
define I/O lines #6, & 0 as outputs and I/O lines #7, 5, 4, 3, 2, & 1 as
inputs.
232SDD16-1005 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104

Set Power-up States Command

The Set Power-up States command is used to set the states of
output lines when the module's power is recycled. This command
requires two data bytes. These data bytes specify the output state
of each output line. The first data byte represents the eight most
significant I/O lines (15 - 8). The second data byte represents the
eight least significant I/O lines (7 - 0). If a bit position is set to a "0"
then the state of that output line will be set LOW. If a bit position is
set to a "1" then the state of that output line will be set HIGH.
Command: !0SS
Argument:
Response: none
ASCII Example: !0SSÛ@
Dec. Example: !0SS<219><64>
Hex. Example: !0SS<DB><40>
Bin. Example: !0SS<11011011><10000000>
Description: the first byte sets output lines #15, 14, 12, 11, 9, & 8
HIGH and output lines #13, & 10 LOW at power-up; the second byte
sets output line #7 HIGH and output lines #6, 5, 4, 3, 2, 1, & 0 LOW
at power-up. Note: If any of these lines are defined as inputs the bit
settings are ignored.

Read Configuration Command

The Read Configuration command returns the module's I/O
definitions and the outputs power-up state. Four data bytes are
returned. The first two data bytes contain the definition of the eight
most significant I/O lines (15 - 8) and the eight least significant I/O
lines (7 - 0) respectively. If a bit position is set to a "0" the I/O line is
defined as an input, if set to a "1" the I/O line is defined as an output.
The second two data bytes contain the power-up states of the most
significant output lines (15 - 8) and the least significant output lines
(7 - 0) respectively. If a bit position is set to a "0" the power-up state
of the output will be LOW, if set to a "1" the output will be HIGH.
13 14
{I/O msb}{I/O lsb}
232SDD16-1005 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104