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https://github.com/uhi22/pyPLC.git
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feature: prepared connector locking and safe-shutdown
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uhi22
parent
837d542329
commit
6231dc5468
3 changed files with 103 additions and 21 deletions
107
fsmPev.py
107
fsmPev.py
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@ -22,16 +22,21 @@ stateWaitForServiceDiscoveryResponse = 5
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stateWaitForServicePaymentSelectionResponse = 6
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stateWaitForContractAuthenticationResponse = 7
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stateWaitForChargeParameterDiscoveryResponse = 8
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stateWaitForCableCheckResponse = 9
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stateWaitForPreChargeResponse = 10
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stateWaitForContactorsClosed = 11
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stateWaitForPowerDeliveryResponse = 12
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stateWaitForCurrentDemandResponse = 13
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stateWaitForWeldingDetectionResponse = 14
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stateWaitForSessionStopResponse = 15
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stateChargingFinished = 16
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stateWaitForConnectorLock = 9
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stateWaitForCableCheckResponse = 10
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stateWaitForPreChargeResponse = 11
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stateWaitForContactorsClosed = 12
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stateWaitForPowerDeliveryResponse = 13
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stateWaitForCurrentDemandResponse = 14
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stateWaitForWeldingDetectionResponse = 15
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stateWaitForSessionStopResponse = 16
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stateChargingFinished = 17
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stateUnrecoverableError = 88
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stateSequenceTimeout = 99
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stateSafeShutDownWaitForChargerShutdown = 111
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stateSafeShutDownWaitForContactorsOpen = 222
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stateEnd = 1000
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dinEVSEProcessingType_Finished = "0"
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@ -79,6 +84,8 @@ class fsmPev():
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s = "WaitForContractAuthenticationResponse"
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if (statenumber == stateWaitForChargeParameterDiscoveryResponse):
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s = "WaitForChargeParameterDiscoveryResponse"
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if (statenumber == stateWaitForConnectorLock):
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s = "WaitForConnectorLock"
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if (statenumber == stateWaitForCableCheckResponse):
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s = "WaitForCableCheckResponse"
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if (statenumber == stateWaitForPreChargeResponse):
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@ -99,6 +106,12 @@ class fsmPev():
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s = "UnrecoverableError"
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if (statenumber == stateSequenceTimeout):
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s = "SequenceTimeout"
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if (statenumber == stateSafeShutDownWaitForChargerShutdown):
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s = "SafeShutDownWaitForChargerShutdown"
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if (statenumber == stateSafeShutDownWaitForContactorsOpen):
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s = "SafeShutDownWaitForContactorsOpen"
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if (statenumber == stateEnd):
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s = "End"
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return s
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def sendChargeParameterDiscoveryReq(self):
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@ -313,12 +326,12 @@ class fsmPev():
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# (B) The charger finished to tell the charge parameters.
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if (strConverterResult.find('"EVSEProcessing": "Finished"')>0):
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self.publishStatus("ChargeParams discovered")
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self.addToTrace("Checkpoint550: It is Finished. Will change to state C and send CableCheckReq.")
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self.addToTrace("Checkpoint550: ChargeParams are discovered. Will change to state C.")
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# pull the CP line to state C here:
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self.hardwareInterface.setStateC()
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self.sendCableCheckReq()
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self.numberOfCableCheckReq = 1 # This is the first request.
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self.enterState(stateWaitForCableCheckResponse)
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self.addToTrace("Checkpoint555: Locking the connector.")
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self.hardwareInterface.triggerConnectorLocking()
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self.enterState(stateWaitForConnectorLock)
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else:
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# Not (yet) finished.
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if (self.numberOfChargeParameterDiscoveryReq>=20): # approx 20 seconds, should be sufficient for the charger to find its parameters...
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@ -335,6 +348,15 @@ class fsmPev():
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if (self.isTooLong()):
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self.enterState(stateSequenceTimeout)
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def stateFunctionWaitForConnectorLock(self):
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if (self.hardwareInterface.isConnectorLocked()):
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self.addToTrace("Checkpoint560: Connector Lock confirmed. Will send CableCheckReq.")
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self.sendCableCheckReq()
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self.numberOfCableCheckReq = 1 # This is the first request.
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self.enterState(stateWaitForCableCheckResponse)
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if (self.isTooLong()):
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self.enterState(stateSequenceTimeout)
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def stateFunctionWaitForCableCheckResponse(self):
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if (self.cyclesInState<30): # The first second in the state just do nothing.
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return
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@ -482,6 +504,10 @@ class fsmPev():
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else:
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# We requested "OFF". So we turn-off the Relay and continue with the Welding detection.
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self.publishStatus("PwrDelvry OFF success")
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self.addToTrace("Checkpoint806: PowerDelivery Off confirmed.")
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self.addToTrace("Checkpoint810: Changing CP line to State B.")
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# set the CP line to B
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self.hardwareInterface.setStateB()
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self.addToTrace("Turning off the relay and starting the WeldingDetection")
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self.hardwareInterface.setPowerRelayOff()
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self.hardwareInterface.setRelay2Off()
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@ -584,26 +610,63 @@ class fsmPev():
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# Todo: close the TCP connection here.
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# Todo: Unlock the connector lock.
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self.publishStatus("Stopped normally")
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self.hardwareInterface.setStateB()
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self.addToTrace("Charging is finished")
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self.enterState(stateChargingFinished)
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if (self.isTooLong()):
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self.enterState(stateSequenceTimeout)
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def stateFunctionChargingFinished(self):
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# charging is finished. Nothing to do. Just stay here, until we get re-initialized after a new SLAC/SDP.
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pass
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# charging is finished.
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# Finally unlock the connector
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self.addToTrace("Charging successfully finished. Unlocking the connector")
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self.hardwareInterface.triggerConnectorUnlocking()
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self.enterState(stateEnd)
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def stateFunctionSequenceTimeout(self):
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# Here we end, if we run into a timeout in the state machine. This is an error case, and
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# an end of the PEV state machine. The re-initialization is performed by the
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# lower layers SLAC, SDP, together with the connection manager. Nothing to do here.
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# Here we end, if we run into a timeout in the state machine.
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self.publishStatus("ERROR Timeout")
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# Initiate the safe-shutdown-sequence.
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self.addToTrace("Safe-shutdown-sequence: setting state B")
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self.hardwareInterface.setStateB() # setting CP line to B disables in the charger the current flow.
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self.DelayCycles = 66 # 66*30ms=2s for charger shutdown
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self.enterState(stateSafeShutDownWaitForChargerShutdown)
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def stateFunctionUnrecoverableError(self):
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# Here we end, if the EVSE reported an error code, which terminates the charging session.
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# This is an end of the PEV state machine. The re-init is performed by the lower layers. Nothing more to do here.
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self.publishStatus("ERROR reported")
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# Initiate the safe-shutdown-sequence.
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self.addToTrace("Safe-shutdown-sequence: setting state B")
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self.hardwareInterface.setStateB() # setting CP line to B disables in the charger the current flow.
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self.DelayCycles = 66 # 66*30ms=2s for charger shutdown
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self.enterState(stateSafeShutDownWaitForChargerShutdown)
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def stateFunctionSafeShutDownWaitForChargerShutdown(self):
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# wait state, to give the charger the time to stop the current.
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if (self.DelayCycles>0):
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self.DelayCycles-=1
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return
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# Now the current flow is stopped by the charger. We can safely open the contactors:
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self.addToTrace("Safe-shutdown-sequence: opening contactors")
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self.hardwareInterface.setPowerRelayOff()
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self.hardwareInterface.setRelay2Off()
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self.DelayCycles = 33 # 33*30ms=1s for opening the contactors
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self.enterState(stateSafeShutDownWaitForContactorsOpen)
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def stateFunctionSafeShutDownWaitForContactorsOpen(self):
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# wait state, to give the contactors the time to open.
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if (self.DelayCycles>0):
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self.DelayCycles-=1
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return
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# Finally, when we have no current and no voltage, unlock the connector
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self.addToTrace("Safe-shutdown-sequence: unlocking the connector")
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self.hardwareInterface.triggerConnectorUnlocking()
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# This is the end of the safe-shutdown-sequence.
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self.enterState(stateEnd)
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def stateFunctionEnd(self):
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# Just stay here, until we get re-initialized after a new SLAC/SDP.
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pass
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stateFunctions = {
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stateNotYetInitialized: stateFunctionNotYetInitialized,
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@ -615,6 +678,7 @@ class fsmPev():
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stateWaitForServicePaymentSelectionResponse: stateFunctionWaitForServicePaymentSelectionResponse,
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stateWaitForContractAuthenticationResponse: stateFunctionWaitForContractAuthenticationResponse,
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stateWaitForChargeParameterDiscoveryResponse: stateFunctionWaitForChargeParameterDiscoveryResponse,
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stateWaitForConnectorLock: stateFunctionWaitForConnectorLock,
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stateWaitForCableCheckResponse: stateFunctionWaitForCableCheckResponse,
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stateWaitForPreChargeResponse: stateFunctionWaitForPreChargeResponse,
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stateWaitForContactorsClosed: stateFunctionWaitForContactorsClosed,
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@ -624,7 +688,10 @@ class fsmPev():
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stateWaitForSessionStopResponse: stateFunctionWaitForSessionStopResponse,
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stateChargingFinished: stateFunctionChargingFinished,
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stateUnrecoverableError: stateFunctionUnrecoverableError,
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stateSequenceTimeout: stateFunctionSequenceTimeout
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stateSequenceTimeout: stateFunctionSequenceTimeout,
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stateSafeShutDownWaitForChargerShutdown: stateFunctionSafeShutDownWaitForChargerShutdown,
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stateSafeShutDownWaitForContactorsOpen: stateFunctionSafeShutDownWaitForContactorsOpen,
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stateEnd: stateFunctionEnd
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}
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def stopCharging(self):
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@ -92,6 +92,17 @@ class hardwareInterface():
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def getPowerRelayConfirmation(self):
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return 1 # todo: self.contactor_confirmed
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def triggerConnectorLocking(self):
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self.addToTrace("Locking the connector")
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# todo control the lock motor into lock direction until the end (time based or current based stopping?)
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def triggerConnectorUnlocking(self):
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self.addToTrace("Unocking the connector")
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# todo control the lock motor into unlock direction until the end (time based or current based stopping?)
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def isConnectorLocked(self):
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return 1 # todo: use the real connector lock feedback
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def getInletVoltage(self):
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# uncomment this line, to take the simulated inlet voltage instead of the really measured
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# self.inletVoltage = self.simulatedInletVoltage
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@ -311,6 +311,8 @@ DC or AC and which power pins are used. The car announces the maximum current li
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* Checkpoint545: The charger confirms with ChargeParameterResponse. The contains the limits from charger side, e.g. min and max voltage,
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min and max current. Now, the initialization phase of the charging session is finished.
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* Checkpoint550: The car changes to CP State to C or D, by applying an additional resistor between CP and ground.
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* Checkpoint555: The car controls the connector lock motor into direction 'lock'.
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* Checkpoint556: The car checks whether the connector lock is confirmed.
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* Checkpoint560: The car sends CableCheckRequest. This contains the information, whether the connector is locked.
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* Checkpoint561: The charger applies voltage to the cable and measures the isolation resistance.
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* Checkpoint565: The charger confirms with CableCheckResponse.
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@ -333,6 +335,8 @@ is active (current limitation, voltage limitation, power limitation).
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* Checkpoint710: The CurrentDemandRequest/CurrentDemandResponse are repeated during the charging.
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* Checkpoint800: When the end of charging is decided (battery full or user wish), the car sends PowerDelivery(Stop)Request.
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* Checkpoint805: The charger confirms with PowerDeliveryResponse.
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* Checkpoint806: The car receives the PowerDeliveryResponse.
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* Checkpoint810: The car changes the CP line from StateC to StateB. (according to Figure 107)
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* Checkpoint850: The car sends WeldingDetectionRequest.
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* Checkpoint855: The charger confirms with WeldingDetectionResponse.
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* Checkpoint900: The car sends SessionStopRequest.
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