SMT8-FT TECHNICAL MANUAL

Perfect Power Online Manuals.

 

Support for your SMT8-FT Unit.

PROTECTION

The SMT8-FT has a powerful protection circuit. In essence the unit monitors certain INPUT signals and when the specified limits are exceeded it will affect three outputs. The protection limits are visible in CONFIG, PROTECTION PARAMETERS.

 

SMT8-FT - ShiftF9 - Protection

 

The protection is used to save the engine if anything goes wrong. Most of the time the engine was modified and thus is more susceptible to mishaps. Once the protection comes one, that is to say any of the inputs exceeds the specified limit, then it can affect the following outputs, provided you use them.


MODIFY (MOD) THE ANALOG OUTPUT
This is the most used feature. Take the TPS signal back, over-fuel the engine, or affect the AMP signal.

 

RETARD (RET) THE IGNITION
This is also very useful. Make sure you open the ignition retard limit up.

 

CUT THE FUEL
Can be used, but the engine dies until the violated limit returns to normal.

 

CUT THE IGNITION
This is a desperate measure! Use with caution! This is seldom done.

All the following items refer to MODIFYING the analog signal.

 

Mod AMP Limit
Once the specified AMP signal is exceeded the difference changes the analog circuit proportional.

 

Mod Engt Limit
Once the specified temperature is exceeded the difference changes the analog proportional.

 

Mod RPM Limit
Once the RPM is exceeded, the difference changes the analog signal proportional.

 

Mod ANA Limit
Once the limit is exceeded, the difference changes the analog output signal proportional.

 

Mod Time
If any of the above limits are exceeded then the unit waits the specified time in seconds before affecting the analog circuit.


All the following items refer to RETARDING the ignition signal


Ret AMP Limit
Once the specified AMP limit is exceeded the difference will retard the ignition signal proportional.

 

Ret Engt Limit
Once the Engine Temperature is exceeded the difference will retard the ignition signal proportional

 

Ret RPM Limit
Once the RPM is exceeded the difference will retard the ignition proportional

 

Ret ANA Limit
Once the analogue limit is exceeded the difference will retard the ignition proportional.

 

Ret Time
The retarding comes in effect after the specified time in seconds.


All the following items refer to CUTTING the fuel injection of the ignition


Cut AMP Limit
Once the specified AMP limit is exceeded the injections are cut.

 

Cut Engt Limit
Once the Engine temperature is exceeded the injection is cut.

 

Cut RPM Limit
Once the RPM is exceeded the injection is cut.

 

Cut ANA Limit
Once the analogue limit is exceeded the injection is cut.

 

Note : A zero entry in any field disables this field.

 

SMT8-FT - ShiftF9 - Protection

The MOD protection works on the Analog 1 and 2. The protection circuit will make the output progressively 0 Volts or 5 Volts if the programmable limit(s) are breached. Both analog outputs can be protected. The output can be inverted (Shift F2) which will make the output progressively 0 Volts when a limit is reached. The protection is enabled in the Shift F2 map.

 

All the following items refer to MODIFYING the analog signal.

 

Mod AMP Limit
Once the specified AMP signal is exceeded the difference changes the analog circuit proportional.

 

Mod Engt Limit
Once the specified temperature is exceeded the difference changes the analog proportional.

 

Mod RPM Limit
Once the RPM is exceeded, the difference changes the analog signal proportional.

 

Mod ANA Limit
Once the limit is exceeded, the difference changes the analog output signal proportional.

 

Mod Time
If any of the above limits are exceeded then the unit waits the specified time in seconds before affecting the analog circuit.