National Instruments NI DIDS-2003, Manual, Page: 128 / 214

National Instruments Direct Injector Driver System Manual
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Always Low: Indicated when the cam signal is constantly low upon each crank trigger wheel feature (M
tooth gap or Plus1 tooth).
An Error condition of the parameter does not cause a loss of sync.
CamSelect
Tip Strip: Selects which Cam signal is used for EPT
Detail: The DI Driver System supports up to two cam signals for the purpose of variable valve timing
control. For EPT N-M and N+1 patterns , this setting toggles between the use of Cam1 or Cam2 for EPT
synchronization. For EPT encoder patterns, this setting determines which cam signal is used for masking of
the EncZ signal when an encoder is mounted to the crankshaft of a 4-STROKE engine.
EncZMask
Tip Strip: Selects whether encoder Z signal is masked by the selected cam signal or passed directly to the
EPT function
Detail: When set to EncZ Masked , the EncZ signal will be logically ANDed with the cam signal selected by
CamSelect . Therefore, the cam signal must be TRUE to allow the EncZ signal to pass through to the EPT.
When set to EncZ Passed , the EncZ signal will always be passed through to the EPT, regardless of the
cam signal level. Typically, when an encoder is mounted to the crankshaft of a 4-stroke engine, EncZMask
should be set to EncZ Masked , and a cam phase signal must be used. When an encoder is mounted to the
crankshaft of a 2-stroke engine, or mounted to the camshaft of a 4-stroke engine, EncZMask should be set to
EncZ Passed
, and a cam phase signal is not required.
Crank
Tip Strip: Indicates state of the crank signal
Detail: Indicates the logic level of the digital input assigned to the Crank signal in the Digital Input Setup
window. This indicator is not updated at the same rate the signal is changing. It is for reference only.
Cam1
Tip Strip: Indicates state of the CAM signal
Detail: Indicates the logic level of the digital input assigned to the Cam1 signal in the Digital Input Setup
window. This indicator is not updated at the same rate the signal is changing. It is for reference only.