National Instruments NI EDIDS-2400 Series, User Manual, Page: 191 / 314

NI EDIDS-2400 Series User Manual | © National Instruments | 191
Tip Strip: Selects Top Dead Center reference associated with driver channel
Detail: TDC parameters are mapped to a specific PFI Driver channel by selecting a TDCX from the drop-down list in
each PFIX_TDC parameter, where X is the PFI Driver channel number.
PFI_Firing_Window_Start / PFI_Firing_Window_End
Tip Strip: Start of angle-based window around all injection events for a channel, End of angle-based window around
all injection events for a channel
Units: DBTDC
Detail: The four PFI channels within the PFI Driver module share software functions and are multiplexed. Only one
PFI channel within the PFI Driver module is able to operate at one time. Therefore, angle-based firing windows are
used to define a period during which an injection event can take place for a given PFI channel. A firing window is
created around each PFI channel, specified by a firing window start and end parameter for the PFI Driver module.
The firing window must not be greater than a span of 180 degrees, such that the firing windows around each of the
four channels overlap. If the windows around each of the four PFI channels overlap, then the Firing Window Overlap
Detected Indicator will be set TRUE and one or more of the four injector channels may not operate.
PFI_Firing_Window_Start: Defines the start of the window in Degrees Before Top Dead Center (DBTDC). The TDC
reference for the window is the TDCX value associated with the applicable PFI channel.
PFI_Firing_Window_End: Defines the end of the window in Degrees Before Top Dead Center (DBTDC). The TDC
reference for the window is the TDCX value associated with the applicable PFI channel.