ElmoMC SimplIQ Software Manual - Manual (Page 106)

SimplIQ Software Manual Development Aids
MAN-SIMSW (Ver. 1.4)
7-10
The trigger defines when the recorder is to start. The recorder can be programmed to start
before the trigger event, so that the trigger event can occur “in the middle of the action.” This
is possible because the recorder begins to record at the instant it is launched by the RR
command, so that when the trigger event occurs, the pre-trigger information is already
recorded.
Example:
The signal to be recorded is speed, and the trigger is set on BG. After launching the recorder
with RR=3, the following command sequence is given: JV=5000;BG.
The following graph depicts the pre-trigger delay:
0 2 4 6 8 10
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
S peed C ommand
Time
Triggered on B G with
0% pre-trigger delay
Triggered on B G with
20% pre-trigger delay
Figure 7-2: Pre-trigger Delay
In this example, the recorder works for 10 seconds. In such a case, a pre-trigger delay of 20%
requires 2 seconds, in order to acquire the pre-trigger data. A BG command set for less than 2
seconds after the RR=3 will be missed.
The following table lists the trigger parameters.
RP[N] Description Definition
RP[0] Recorder time quantum 0: Speed controller sampling time (4 * TS µsec)
1: Torque controller sampling time (TS µsec)
RP[1] Trigger variable Similar to RC, but only 1 bit may be non-zero.
The trigger variable does not need to be a recorded
variable. For example, RV[1]=17, RP[1]=1 defines a
trigger that is made on signal #17 (stator field angle).
RP[2] Pre-trigger storage, in
percent
0 to 100 (percent).