- Open the project in RSLogix/Studio5000 and go online with the PLC
- Open the PLC Controller Tags
- Search for interested Tags for Trend
- Right-click the variable and then click Trend.
- A window with the created Trend will open.
- Right-click on Chart Properties.
Settings
to improve the graph
- Legend position (Bottom) and show the X axis (Display in ms)
Increase the line thickness
(Width) to 2. Another tip is to change the maximum values and leave each
variable with a different limit, to be clearer during overlap
Increase data acquisition time
on the X axis (30 seconds)
Configuring the Y axis: Preset from Pens tab
Selecting the Isolated
graphing option, the graphs will be shown separately and without overlap.
Press Run to turn on the
oscilloscope.
In practice, this tool can
help when doing trouble-shooting, as for example to see if a digital signal is
flickering, is having interference, to see if the signal activation time is
correct, or the speed curve of a VFD, key Servo motors parameters used in motion control (Position, Velocity, Acceleration, Jerk, Torque, Error), among others. We usually delete
Trend after the trouble-shooting exercise, to avoid unnecessary consumption of
processing and PLC memory.
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