thermo fan temp and alternator control

[walkaboutandy]

Hi all, Does anyone know if the FC alternator needs a control signal from the ECU? Apparently the MX5 does but not sure about the RX7.

Also, does anyone know whats the recommended water temperature, at the water sensor (thermostat area), to switch on a radiator cooling fan and what temp range to cool it over before turning the fan off.

Many thanks.