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11.1.3
Sleep/Wakeup summary
RKP state
State Awake
State Sleep
Sleep/Wakeup Source
Sleep/Wakeup
interface
Hardware two-wire
interface
Wakeup_Out Pin
On = High [~ (T30 –
2,3V)]
OFF = Low [~ 0V]
Wakeup_In Pin
VIN = > 70% * T30
VIN = < 30% * T30
CAN Rx
Ignored (regarding sleep
state)
Other CAN messages are
received normally
Ignored
CAN Tx
No CiA320 messages are
sent
No communication
Buttons
Button state is interpreted
safely
Cyclic button read
keypad wakes with
button push
Button state is not
interpreted safely
CAN Bus
Wakeup_Out Pin
“High-Z” (Low)
“High-Z” (Low)
Wakeup_In Pin
Ignored
Ignored
CAN Rx
If there are no “stay
awake” messages sent or
the command “go to
sleep” is sent the keypad
changes it’s state to sleep
With communication
on the CAN bus the
keypad changes its
state to awake
CAN Tx
Responds to CiA320
messages
No communication
Buttons
Button state is interpreted
safely
Cyclic button read
keypad wakes with
button push
Button state is not
interpreted safely
Structure of lightning objects
For understanding how the lightning setup works, knowledge over the internal dependency
between the lightning objects is necessary. For the communication protocols J1939 and
CANopen/CANopenSafety the lightning setup uses the same topology. The objects which are
used for the lightning setup are listed in the following section.