7.9 3D Tuning Maps 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
• Enable - Turns the generic closed loop function on or off.
• Closed loop PID type - This allows you to change which PID loop type is used. A Type B loop has the P
term react to changes in error, while a Type C load has the P term respond to changes in the feedback input
variable instead.
• Load Axis - Sets what variable is used for the load in the 3D table.
• Feedback Input Variable - This is the sensor input to target with the PID loop.
• Max Feedback Input - The highest value the loop can target.
• Min Feedback Input - The lowest value the loop can target.
• Control Output Port / Pin - The PWM output channel used to control the device.
• Frequency - The frequency used to pulse the output.
• Max Control Output - The highest duty cycle the PID loop can command.
• Min Control Output - The lowest duty cycle the PID loop can command.
• Control Interval - The time between updating the control output duty.
• P Term, I term, and D term - The gain terms used to control the PID loop.
• CLT / MAT units - If using a temperature input as the load or feedback input variable, you can set this screen
to display Celsius or Fahrenheit.
• Target Table - This is the target value which the closed-loop algorithm aims to match to the feedback input
by controlling the PWM output.
7.9 3D Tuning Maps
This menu allows alternate 3D views of tuning maps from other settings: Fuel, ignition, boost control, and sequen-
tial injection timing. Each view has a set of mini gauges to help tune the map. You may right click on the gauges
and swap them to other values if you prefer to use a different gauge type.
7.10 CAN bus / Testmodes
This menu allows you to connect the MS3Pro to external CAN based devices, use diagnostic functions including
check engine light and limp home modes, and enable a few highly specialized options.
7.10.1 CAN parameters
The MS3Pro’s CAN wires allow it to connect to other devices over a network that uses a simple two wire connection.
These devices can add inputs and outputs, or display information from other devices on the CAN network. Here
are some general notes; we plan to offer more detailed notes on exactly how to use these settings with specific
devices. You will only need to set this up if the MS3Pro is using the CAN network for data acquisition or to control
remote outputs. You do not need to do anything other then set the CAN ID to zero if using the MS3Pro CAN
network for an external dashboard or other CAN device that is set up to automatically fetch data from the MS3Pro.
The CAN network typically works by passing along sections of memory tables. So many of the settings will
deal with telling the MS3Pro where the table is in memory and how to retrieve it.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 260
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