ZombieVerter Timing Diagrams

Timing Diagrams

Shown below are some simple ZombieVerter scenarios as timing diagrams.

ZombieVerter successfully moving from OFF to RUN mode

ZombieVerter successfully moving from RUN to OFF mode

Timing diagram showing ZombieVerter successfully moving from RUN to OFF mode.

ZombieVerter failing to Precharge

Diagram Source

ZombieVerter successfully moving from OFF to RUN mode

@startuml

scale 100 as 200 pixels
hide time-axis
skinparam backgroundColor #FFFFFF

<style>
timingDiagram {
  backgroundColor #white
  constraintArrow {
    LineThickness 2
    LineColor #lightgray
  }
  .analog {
    LineThickness 3
  }
  .blue {
    LineColor blue
    LineThickness 5
  }
}
</style>

title "ZombieVerter Timing Diagram - RUN -> Start (not to scale)"
footer 2026-03
caption "\nThis diagram illustrates the timing of ZombieVerter input and output signals leading to a normal start sequence.\nThis example shows UDC rising and reaching UDCmin within the precharge timeout period, allowing the system to enter MOD_RUN successfully.\n"

rectangle "OpMode" as OM
concise "Torque Demand" as TQ
binary "T15" as T15
binary "Throttle Position" as THROTTLE
binary "Start" as START
binary "Contactor Power" as CP
binary "NegativeCON" as NEG 
binary "PositiveCON" as POS
binary "PrechargeCON" as PCH
binary "Inverter Power" as INV
analog "UDC Voltage" as UDC <<analog>>

OM is MOD_OFF #LightGray
T15 is {low,high}
START is low
CP is high
INV is low
NEG is low 
POS is low
PCH is low
TQ is ZERO
THROTTLE is {low,high}

@50 as :precharge

' Start
@0
UDC is 0
'OM is MOD_OFF 

@10
T15 is high 

@:precharge-20
THROTTLE is low

@:precharge-10
START is high
START --[#gray]> OM@+10
T15 --[#gray]> OM@+10

@:precharge
OM is MOD_PRECHARGE #LightBlue
NEG is high
PCH@50 <-[#blue]> @+250 : {250ms}

@:precharge+10
START is low
THROTTLE is {low,high}

@300
PCH is high
UDC is 0
PCH --[#gray]> UDC

highlight 300 to 395 #Lavender;line:DimGrey : Variable Pre-Charge Time

@395
UDC is 250
UDC --[#gray]> OM@+5

@400
OM is MOD_RUN #PaleGreen
TQ is "~THROTTLE"
INV@400 <-[#blue]> @+250 : {250ms}
POS@400 <-[#blue]> @+250 : {250ms}

@+250
INV is high
POS is high

@+100
INV is high
THROTTLE is {low,high}
@enduml