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Note: Condition setting, recording function enable, etc. must be done before using
the data logging function. Any incomplete or incorrect settings will result in the recorded
failure. The setting operation is completed by setting the corresponding register. It
should be specially explained that the settings of these registers must be set by means
of communication. After the record full, data will be based on first-in-first-out principle
of circular coverage. When cyclic overwriting occurs, the earliest recorded data will be
overwritten sequentially. Therefore, user are advised to read and save the entire data
record before it is full to prevent data loss.
When the contents of the record parameters have changed, then all the records will not
be retained and start recording from beginning.
4.9.2 Data log read
Read data logs must be read via communication, see Table 4-10.
▼
Table 4-10
The length of each data log can be obtained by reading the byte count address. The
length of the data obtained through the data read address for data log content read, as
shown in the following
fi
gure:
Data content will be returned in the following format:
Each read order can only read a log record. Reading unread number shows how many
logs remain unread. If there is no record that has not been read yet, then the data return
will be 0020h, indicating that the data record has been read.
After reading a record of log must be send back the read status to meter, as a basis for
recording indicators move. Can also give up the record read or clear data records via send
back the read status.