From OpenSCADAWiki
Currently, only value archives can be used as a data source, either directly to them or through the DAQ-parameter attribute with the archive. The number of data sources is not directly limited and is written in separate lines of the argument srcs in the format "{addr}:{min}:{max}:{color}[:{scale}[:{width}]]", where:
- addr — address to:
- the value archive ("/Archive/va_CPULoad_load") or the DAQ-parameter attribute ("/DAQ/LogicLev/gen/F3/var");
- the direct data in the form "<d s='1' aprox='1' per='1'>{p0}={pV0},{p1}={pV1},...,{pN}={pVN}</d>" for periodic, by set the attribute "s" it will allows the period setting in seconds; "aprox" — approximate the transition from one point to another instead of the previous value to all the periodicity points from the packaging;
- the direct data in the form "<d per='0'>{tm0}={pV0},{tm1}={pV1},...,{tmN}={pVN}</d>" for aperiodic of long intervals from months, where tm{N} in seconds.
- min, max — minimum and maximum of the scale, in the scale absence (min >= max), it will be calculated from the real data;
- color — colour of the trend curve;
- scale — separate definition of the trend scale, by default "Global (0)" and generally provided: "Global (0)", "Markers (2)", "Grid and markers (3)", "Markers (log) (6)", "Grid and markers (log) (7)".
- width — width of the trend curve, by default 2.