485SDD16-1005 Manual
15
B&B Electronics -- 707 Dayton Road -- 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: !{addr}SS
Argument: {I/O
msb}{I/O
lsb}
Response: none
ASCII Example: !0SSÛ@
Dec. Example: !0SS<219><64>
Hex. Example: !0SS<DB><40>
Bin. Example: !0SS<11011011><01000000>
Description: Set module 0's (decimal 48) power-up states. 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 #6
HIGH and output lines #7, 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, the outputs power-up state, the module's address, and
the turn-around delay. Six 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. The fifth data byte is the
module's address. The sixth data byte is the turn-around delay.
Command: !{addr}RC
Argument: none
Response: definition of the sixteen I/O lines in two 8 bit bytes, and
the power-up states in two 8 bit bytes. (shown in bold face)
16 485SDD16-1005
Manual
B&B Electronics -- 707 Dayton Road -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5104
ASCII Example: !9RC
UAP@9
♦
Dec. Example: !9RC<
85
><
65
><
80
><
64
><
57
><
04
>
Hex. Example: !9RC<
55
><
41
><
50
><
40
><
39
><
04
>
Bin. Example: !0RC<
01010101
><
01000001
><
01010000
><
01000000
>
<
00111001
><
00000100
>
Description: Read module 9's (decimal 57) configuration. The first
byte (MSB of I/O definitions) - I/O lines #14, 12, 10, & 8 are outputs
and I/O lines #15, 13, 11, & 9 are inputs; the second byte (LSB of
I/O definitions) - I/O lines #6, & 0 are outputs and I/O lines #7, 5, 4,
3, 2, & 1 are inputs; the third byte (MSB of output power-up states) -
output lines #14, & 12 HIGH and output lines #10, & 8 LOW at
power-up; the fourth byte (LSB of output power-up states) - output
line #6 HIGH and output line #0 LOW at power-up; the fifth byte
(module address) is set ASCII "9" (decimal 57); the sixth byte (turn-
around delay) is a decimal 4.
