Functionality And Basic Operation; Sleep Mode (Time Delay Operation); Controller Startup; Task Configuration - Danfoss HFX Series Installation And Operation Manual

HFX Product Family
10.0

FUNCTIONALITY AND BASIC OPERATION

At initial startup, the controller enters the bootloader. A
bootloader is simply a small program that loads the rest of
the rmware when the controller is initially powered up.
This rmware resides in the ash memory and provides
the necessary memory mapping and instructions for the
controller, allowing the application program to be
processed. The bootstrap mechanism provides the means
to enter the bootloader. The bootstrap mechanism is as
follows:
1. Check for PWM1&2
2. Delay 3 seconds
3. If the HFX service tool is connected,
abort and don't load app from ash
4. Otherwise, load and run the app in
ash like normal.
This provides a mechanism to remove a
frozen application.
1. Load a new application, or
2. Reset origin will clear entire application memory.
Boot process
PWM1&2 11.0
YES
HFX service tool is
connected within 3
Abort and don't load app from flash
10.1

SLEEP MODE (TIME DELAY OPERATION)

Sleep Mode provides a mechanism to have a controlled shutdown
of the vehicle control system. This is a bene t because the unit can
11.0 V
NO Continue Booting &
Load app from ash
NO
YES
HFX Product Family Installation and Operation Manual for Matlab® Support Package January 2017
be put into an idle state where less current is required thus
extending battery life. It is also useful with applications where,
Operating Enter Sleep
Mode bit State
Sleep True
Awaken False
prior to shut down, the controller needs to return key functional
outputs to a prede ned or home position.
10.2

CONTROLLER STARTUP

The controller will transition to the shutdown state and then
enter sleep mode after 5 seconds of the ignition pin being low.
The controller will awaken from sleep if {Sleep is low or not
connected} and {IGN is high}
Sleep current 2.4 mA, @ 10 V, 1.9 mA @ 15 V, 1.6 mA@
20 V, 1.2 mA @ 25 V
10.3

TASK CONFIGURATION

The controller supports the following tasks:
Cyclic: Task processed in a prede ned time.
There are 3 pre-de ned task : 1 ms, 5 ms, 50 ms
Freewheeling: Task processed as soon as the program
is started. When complete, it will automatically restart
in a continuous loop. "Background" is the only
freewheeling task available.
State Machine Tasks: Task processed in the 1 ms loop
time, only one task is active at a time and depends on
the state machine transitions.
Note: There are no external events available to trigger task
execution. for more information on the tasks, open the help for
the HFX Application block.
Sleep Allowed State
Ignition Pin < approximately 6.6 V)
Ignition Pin > approximately 6.6 V)
13