Display Controller

 

	The RCA90 Display Controller is a  small sealed module that connects between a Farringdon SWIS Series Steering Wheel display and an Engine Management Unit (ECU). The  ECU  requires most of the standard engine temperatures and pressures to  ensure the engine runs safely within its limits. The readings from  these sensors are transmitted by the ECU to other systems, such as  dashes thereby avoiding the duplication of sensors. The Display Controller reads this ECU data  (whether in RS232 or CAN form) and processes it to be displayed on the  steering wheel. In addition, the controller has a direct input for a  wheel speed sensor (often not connected to the ECU) and lap timing  facilities. The RCA90 Display Controller is available for all Farringdon displays Detailed Description The Display Controller contains a powerful processor and the following interfaces
		RS232 to/from Steering Wheel RS232 from ECU CAN 2B from ECU A wheel speed sensor frequency input An infra red lap time receiver input
Â	The controller also contains non-volatile memory to hold set up information, warning limits, shift  light settings and a large lap time memory used in lap time recall  mode. The controller is available to match various  ECUs and more specifically various cars.  There is no connector on the  module - all connections are made through connectors mounted on the end of flying leads. The controller operates in one of three modes, run mode, set up mode and recall mode. Run Mode The Display Controller will start in Run Mode.   The sensor readings from the ECU are sent to the Steering Wheel for  display and can be selected with the right hand buttons: Oil Pressure,  Water Temperature, Oil Temperature and Fuel Pressure.  The rpm is also  read from the ECU and displayed in the lap time window if required, but more usually, the shift lights are driven from this input. If wheel  speed is available from the ECU, then speed can be displayed in the  left hand bottom window.  If not, a separate wheel speed sensor  (option) can be connected to the controller so that speed can be  measured. Speed is required for the road of course, but is very handy  for checking pit lane speeds. For those systems supplied with lap timing, a  small infra red detector is supplied that plugs into a flying lead from  the Display Controller. This IR Detector will trigger lap timing when it crosses an Infra Beam from a Farringdon Beacon and also when it  crosses the beam from the PI Channel 0 beacons at most UK tracks.   The lap time is displayed in the large top window and remains frozen  for the adjustable hold time The Performance Monitor Option (PMO) is  available with the RCA90 Display Controller.  After the hold time has  expired, the difference between the time from the beacon to the current track position and the corresponding time for the best lap, is  displayed.  The time difference is displayed as a + or - time. The  Performance Monitor is updated about every 10 metres so gives a near  real time indication of the driver.  performance in the current lap  compared with the best.  It can result in staggering lap time  improvements. Set Up Mode Pressing both left hand buttons together switches the system to Set Up Mode where the following parameters of the system  can be adjusted:
		Display for bottom left window Tachometer Display Position Hold Time * Blank Time* Lap timer Main Channel Number* Lap Timer In Channel Number* Performance Monitor On/Off+ Display Performance in Elapsed Time Window+ Elapsed Time in Hours and Mins (normally, mins and secs) Pulses per turn for wheel speed sensor (if not from ECU) Wheel Circumference (needed for speed calculation) Alarm Limit for Fuel Pressure Alarm Limit for Oil Temperature Alarm Limit for Water Temperature Alarm Limit for Oil Pressure** Shift Lights rpm Calculated Gear Indication mph/5000 rpm
	* only on a system with a lap timer (SWIS10-12 or -13) + only with PMO ** oil pressure minimum limit is multiplied by 8  over 5000 rpm which allows low limits to be set that are not reached  even at very low rpm. Recall Mode Pressing both right hand buttons puts the  system in Recall Mode The last lap time will be shown in the lap time window.  The left hand buttons allows the stored laps to be scrolled  through and displayed.