Controller Parameters - AC STAG-4 QBOX BASIC User Manual

2.4. Controller Parameters

The controller firmware version is shown at the bottom of the screen (Fig.13); Text presented on the
exemplary figure means he following:
STAG- 300-8 QMAX PLUS – controller model
2.7.0 / 2.9.0 - controller firmware version number
32.4.0 / 32.4.1 –controller version number
The Parameters window lists a number of parameters which need to be set individually for each
vehicle.
The Car parameters group contains:
 Number of cylinders – numer of engine cylinders
 Engine type – engine type, Standard – normally aspireted engine with no supercharger,
Turbo – supercharged engine, Valvetronic.
 Source of RPM signal – engine speed signal source:
Ignition Coil: ignition coil (standard option). Set the number of cylinders per one coil
for correct data presentation.
Camshaft:
cylinders are switched off in the cut-off state and lack of ignition coil pulses might be
interpreted by the controller as zero engine speed.
CAUTION Use that option only with a digital sensor of the timing belt. Define
number of pulses per one engine revolution. Option active while a timing belt digital
sensor feeds engine speed pulses to the controller: specifies the number of pulses
per one engine revolution. Parameter value must be adjusted for correct engine
speed readings in the controller
Petrol injection pulses - In older cars the engine speed brown wires need not to be
connected since the controller can calculate current speed from injection pulses.
When RPM readings are disrupted (RPM changes significantly, but the engine
operation is stable), specify the minimum injection pulse time to ensure filtering the
extra-injection pulses and stabilize the RPM readings.
 RPM signal – RPM signal source.
RPM detection threshold in Volts. Set the detection threshold to a value ensuring proper
revolutions reading from the controller. E.g. for impulses originating in a petrol engine
usually equal app. 5 [V], set the detection threshold to app. 2,5 [V]. For impulses
originating from the ignition coil, set the threshold to app. 7 [V].
Nissan Micra is an exception. Its computer ignition impulses equal app. 1,4 [V], in which
case the detection threshold needs to be set at app. 1,0 [V].
For some Renault Megan models, the detection setting needs to be set at app.10 [V]
 RPM signal filter – Switching on (YES) and switching off (NO) of RPM signal filtration. In
case of cars from the U.S.A., correct reading of RPM value can be difficult, so this option
should be switched on. In other cases, it should be switched off.
 Double injectors – an option available only in Q-max controllers, when the set number of
cylinders does not exceed 3 (Q-max 6) or 4 (Q-max 8). This feature is useful in cars
equipped with 3- or 4-cylinder motors with two petrol injectors per cylinder (some Nissan
vehicles). In such cases, one petrol injector of each pair should be connected
successively to the first three (Q-max 6) or four (Q-max 8) controller channels and the
other injector of each pair to the remaining three or four controller channels. In this
configuration, the controller controls simultaneously both emulators of each pair, i.e.
channels [1 and 4], [2 and 5] and [3 and 6] for Q-max 6, and channels [1 and 5], [2 and 6],
[3 and 7] and [4 and 8] for Q-max 8.
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timing belt sensor. This option is very useful in vehicles, in which
within this document, in particular photographs, drawings, illustrations, trademarks, etc
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