Little
Endian
AQ0,1 AQ0,2 AQ0,3 AQ0,4
80 00
-5 Volts
-10 Volts
2.5 Volts
5 Volts
This data can be broken up into sections. The
Data Record Map
includes the 4 bytes of header. The
General Data Block
consists of the sample number, the error code, and the general status.
The I/O Data
Block
includes all the other items in the above table.
Explanation of Status Information
Header Information –
Bytes 0, 1 of Header:
The first two bytes of the data record provide the header information.
BIT 15
BIT 14
BIT 13
BIT 12
BIT 11
BIT 10
BIT 9
BIT 8
1
N/A N/A N/A N/A N/A N/A N/A
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
N/A N/A N/A N/A N/A N/A N/A N/A
Bytes 2, 3 of Header:
Bytes 2 and 3 make up a word, which represents the Number of bytes in the data record, including the
header. Byte 2 is the low byte, and byte 3 is the high byte.
Note:
The header information of the data records is formatted in little endian.
General Status Information (1 Byte)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Program
Running
N/A N/A N/A N/A Waiting
for
input from IN
command
Trace On
Echo On
ZC and ZD Commands
Another important feature of the data record is that it contains two variables that can be set by the user. The
ZC and ZD commands are responsible for these variables. Each variable can be a number, a mathematical
equation, or a string. See the Command Reference for more information on the ZC and ZD commands.
40 Chapter 3 Communication
RIO-47xxx
