6. Function blocks
6.1 Manufacturer function blocks
6.1.7.5 DL - Data logger
General
easyE4 base devices provide exactly one data logger function
block DL01.
You can use the data logger function block to write operating
data with a timestamp to a log file on a memory card in the
easyE4 base device. In order for this function block to work, a
memory card must always be inserted in the device. You can
select a filename for the log file when configuring the function
block.
Digital function block inputs T1 through T4 and analog function
block inputs I1 through I4 are always logged for each data set. In
addition, the log will indicate which input triggered the logging
operation.
Operating principle
Logging can be triggered with a rising edge at one of the trigger inputs T1 through T4
or a change at analog function block inputs I1 through I4. You can use the Delta ΔI
parameter for each function block input (I1 through I4) to specify the data change
magnitude starting from which logging will be triggered.
Any byte, word, or double word operand can be connected to analog inputs I1
through I4.
All events are saved as data sets in a specified number of files. One file after another
gets filled with the indicated number of data sets.
There are two storage modes available for selection:
1. Ring buffer
At the same time as the last file gets filled with the last data set, the first file
with all data sets gets deleted. The next data set is written to the first file as
the first data set.
2. Until number of log files is reached
Logging stops at the same time as the last file gets filled with the last data set.
easyE402/24 MN050009ENEaton.com
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