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Documentation Number 232OPSDA1397 Manual 13
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5105
The command syntax for the extended command set is shown
below:
Command Syntax: #0____
||||||
|||||Compliment
||||Data Byte
|||2
nd
Command Byte
||1
st
Command Byte
| Address Byte
Start of Message Byte
Reading A/D Channels Command
The Read A/D channels command returns two bytes for each
channel read. The two bytes represent the most significant byte
(MSB) and least significant byte (LSB) of the reading. The MSB is
received first, followed by the LSB. This command requires a data
byte. The data byte is used to specify the number of the highest
channel to be read. All channels less than this channel will be read
as well. For example, if the data byte has a value of 3, then channels
0 to 3 will be read. The highest channel is read first.
Command Syntax
!0RA{#}
Where “{#}” is a byte that specifies the number of the highest
channel to be read. See Table 3.3
Response Syntax
{ch(#)MSB}{ch(#)LSB}{ch(#-
1)MSB}...{ch0MSB}{ch0LSB}
The most significant byte of the channel specified is received
first. The least significant byte and the lower channels will follow in
descending order. “{chxMSB}” and “{chxLSB}” represent the most
and least significant bytes of the A/D conversion result.