User Manual, Firmware rev. 3.0 or LATER Owner's manual

154 Publication 1404-UM001F-EN-P - November 2009
Chapter 7 Data Logging
Accessing the Min/Max Log by Using the Display Module
You may view, enable, disable, or clear the min/max log by using the
display module.
Interfacing with the Min/Max Log by Using Communication
Write Min/max Log configuration settings and command by using a
table write to the Min/Max Log Configuration/Read-back Select
table.
Access data in the Min/max Log by using the indexed read method.
Write to the Min/Max Log Configuration/Read-back Select
table to
select the read-back mode and/or which of 74 min/max records to
return on the next read of the Min/Max Log Results
table.
The Min/Max Log Configuration/Read-back Select
table contains these
nine integer elements:
• Password: Required to enable, disable or clear the min/max log;
-1 for selecting a record
• Parameter to read: The record number to read next, or the
starting record for auto-increment read-back mode
• Read-back mode: 0 selects auto-increment mode; returns the
next min/max record after each read of the results table, 1
selects manual indexed mode (only mode 0, 1 and 2 are
supported by DF1 and remote I/O communication)
• Enable/disable Min/max Log: 0 disables, 1 enables
• Clear Min/max Log command: 0 takes no action, 1 clears the log
and writes a time stamp
• Timestamp of last Min/max clear: the last four elements store the
last-clear timestamp (read-only; these elements ignored on a
write)