User`s guide

Table Of Contents
Network Functions in the Operator Panel
274 Mitsubishi Electric, MA00759F
The TRENDS Directory
The directory is only available if there are trends and/or data loggings defined in the
operator panel and the operator panel is running. The trend objects are shown as .skv
files with 0 length. It is only possible to read files. To read a file it must be opened
with the attribute READ. The attribute READWRITE will cause an error. Curve 1
must be used for a trend to be valid.
File Format
Each sampling is stored on a line ending with [carriage return][linefeed].
The file contains the following information:
date;time;value1;value2;value3;value4;value5;value6;OFF
The file ends with END[carriage return][linefeed].
Only the number of curves in the trend are transferred, i.e. no empty fields.
OFF is included in the sampling in the following cases, and indicates a pause in the
sampling.
When the operator panel enters run mode, a copy of the last stored sampling is
added. The copy is marked with OFF. As soon as valid values reach the operator
panel, new values are stored without OFF marking.
When the Trend-enable signal is used, should the signal go low the sample is
marked with OFF. When the signal goes high a new value is stored without OFF
marking.
When stored trend values are transferred through FTP, a sample with OFF
marking will be stored. When the transfer is ready a new sample is stored without
OFF marking.