National Instruments NI EDIDS-2400 Series, User Manual, Page: 97 / 314

NI EDIDS-2400 Series User Manual | © National Instruments | 97
ESTTL1_SkipFireChanXEnable
Tip Strip: Enables Skip Fire on ESTTL1 Channel
Detail: Enables the skip fire sequence on a particular ESTTL1 channel as specified by ESTTL1_SkipFire_Cycles and
ESTTL1_SkipFire_OnCycle .
ESTTL1-X_MaxDwell
Tip Strip: Maximum allowable Main spark dwell
Units: msec
Detail: Specifies the maximum allowable spark dwell associated with an ESTTL1 channel. If the main dwell ESTTL1-
X_MainDwell is set to a value greater than the max dwell ESTTL1-X_MaxDwell value, the main spark pulse will be
cut short at the max dwell value.
ESTTL1-X_SparkTiming
Tip Strip: Main spark timing
Units: DBTDC
Detail: Spark is generated with a trailing edge coinciding with Main spark timing (see Figure 4.3.2.1 1 ). The length of
the main spark pulse will be according to what is specified in the ESTTL1-X_MainDwell . The leading edge will be
determined by the current requested Dwell and the current engine speed. ESTTL1-X_SparkTiming will always take
precedence over ESTTL1-X_MainDwell in the presence of engine speed fluctuations. If the engine speed increases
after the spark pulse has started, then the actual dwell will be slightly shorter than the requested Dwell to ensure that
correct spark timing is achieved. Likewise, if the engine speed decreases after the spark pulse has started, then the
actual dwell be will slightly longer than the requested Dwell.