Delta RMC151 - Manual (Page 183)

3 Controller Features
You have set the Plot Duration to 4 seconds and the Trigger Percentage to 25%. When
you trigger a plot, the first 1 second of the plot will contain data from immediately before
the trigger occurred, and the last 3 seconds will contain data from immediately after the
trigger occurred.
How to Trigger a Plot
Note:
To trigger a plot, the trigger must first be armed. See the Rearming the Trigger section
below.
Note:
If a plot is triggered immediately after rearming it, and the trigger percentage is greater than
0%, the plot will not contain any data before the trigger. After rearming, there must be a
delay long enough to record the data to fill the plot before the trigger time.
There are two ways of triggering a plot: manually and automatically:
• Automatic Trigger
Plots can be automatically triggered by certain conditions. Currently, a plot can be
automatically triggered only by motion commands. If automatic triggering is
enabled, a plot will trigger every time a motion command is issued to the specified
axis.
To set up automatic triggering, see the Changing the Trigger Settings section
below.
Note:
The RMC default setting is to automatically trigger plots on motion commands.
• Manual Trigger
To manually trigger a plot, issue the Trigger Plot (102) command. You can also
issue the Trigger Plot command by choosing Trigger Plot on the Plots menu.
Note:
Even if you manually trigger a plot, the RMC may also automatically trigger plots
because it is set to do so by default. To disable automatic triggering, see the
Changing the Trigger Settings section below.
Rearming the Trigger
Before triggering a plot, the trigger must first be armed. This tells the RMC to start
recording the data in the plot so that when the plot is triggered, it can provide the data.
The plot will not trigger if it is not armed. When the RMC starts up, the trigger is armed
and therefore prepared to trigger. After triggering a plot, the trigger is no longer armed
and must be rearmed before you can trigger a plot again.
The default setting is Automatic rearm. Therefore, you do not need to rearm the plot if
you have the default settings.
There two methods of rearming the trigger:
• Automatically Rearm
The plot trigger can be set to automatically rearm after it triggers. This is the
default RMC plot setting. After a plot triggers, it is ready to be immediately
triggered again.
Note:
If you are issuing motion commands in rapid succession, the automatic rearm
feature may cause the plots to be cut short when the next plot is triggered. To get
long plots, you should change the plot settings to manual rearm. See the Changing
the Trigger Settings section below.
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