Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 135)

Publication AG-UM008C-EN-P - February 2005
Configuring MicroLogix 1100/1200/1500 Controllers 3-67
The data is retrieved as an ASCII string with the following format:
<date><UDS><time><UDS><1
st
Data><UDS><2
nd
Data><UDS>…<UDS><Last
Data><NUL>
•
where:
<date> = mm/dd/yyyy - ASCII characters (date is optional)
<time> = hh:mm:ss - ASCII characters (time is optional)
<UDS> = User Defined Separator (TAB, COMMA, or SPACE)
<X Data> = ASCII decimal representation of the value of the data
<NUL> = record string is null terminated
•
If the Real Time Clock module is not present in the controller,
<date> is formatted as 00/00/0000, and <time> is formatted as
00:00:00.
•
The Communications Device determines the number of sets of
data that have been recorded but not retrieved.
•
The controller performs a the data integrity check for each
record. If the data integrity check is invalid, a failure response is
sent to the Communications Device. The data set is deleted as
soon as the failure response is queued for transmission.
Accessing the Retrieval File
You can use a dedicated retrieval tool or create your own application.
Retrieval Tools
There are a number of retrieval tools designed for use with Palm OS,
Windows
® CE, Windows 9x, and Windows NT ® . You can download
these free tools from our web site. Visit
http://www.ab.com/micrologix.
TIP
For easy use with Microsoft Excel, use the TAB
character as the separator character.