Crash_Override/ESP32_ChinaDieselHeater_Control
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added cable compensation to LVC warning threshold

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This commit is contained in:
Ray Jones 2019-07-27 08:50:09 +10:00
parent ca0e763da6
commit dfa60eb491
1 changed files with 42 additions and 32 deletions
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74
src/Protocol/SmartError.cpp
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@ -113,40 +113,53 @@ CSmartError::monitor(uint8_t newRunState)
_prevRunState = newRunState;
}
/////////////////////////////////////////////////////////////////////////////
// checkVolts(float ipVolts, float glowI, bool throwfault)
//
// retval:
// 0 - OK
// 1 - Warning less than 12/24 (or .5V over LVC for higher LVC levels)
// 2 - Warning less than LVC
// Performs low voltage cutout function / testing
// Input voltage drop is compensated here by using the glow plug current, 0.1V/A
//
// returns:
// 0 - OK
// 1 - Warning: Above LVC, but less than 12/24 (or .5V over LVC for higher LVC levels)
// 2 - Error: LVC tripped
int
CSmartError::checkVolts(float ipVolts, float glowI, bool throwfault)
{
// check for low voltage
// values here are x10 integers
if(NVstore.getHeaterTuning().lowVolts) { // only if enabled
float cableComp = glowI * 0.1; // allow 1V drop for 10A current (bit naive but better than no compensation)
float Thresh = NVstore.getHeaterTuning().getLVC() - cableComp; // NVstore
if(ipVolts < Thresh) {
if(throwfault) {
_Error = 2; // +1 over displayed error code
requestOff();
}
return 2;
}
int alert = Thresh + 0.5;
if(NVstore.getHeaterTuning().sysVoltage == 120) {
if(alert < 12)
alert = 12;
}
else {
if(alert < 24)
alert = 24;
}
if(ipVolts < alert) {
return 1;
// check for low voltage
// Native NV values here are x10 integers
// loom compenstaion, allow 1V drop for 10A current (bit naive but better than no compensation)
float cableComp = glowI * 0.1;
float threshLVC = NVstore.getHeaterTuning().getLVC() - cableComp; // NVstore
// test low voltage cutout
if(ipVolts < threshLVC) {
if(throwfault) { // only throw faults if directed to do so
_Error = 2; // internals error codes are +1 over displayed error code
requestOff(); // shut heater down
}
return 2; // Low voltage return value = 2
}
return 0;
// warning threshold
float threshWarn = threshLVC + 0.5; // nominally create a warning threshold, 0.5V over LVC threhsold
float alertlimit; // but always introduce it if below system voltage
if(NVstore.getHeaterTuning().sysVoltage == 120) {
alertlimit = 12.0 - cableComp;
}
else {
alertlimit = 24.0 - cableComp;
}
if(threshWarn < alertlimit) {
threshWarn = alertlimit;
}
if(ipVolts < threshWarn) {
return 1; // LVC OK, but below warning threshold, return code = 1
}
return 0; // all good, return code = 0
}
@ -154,8 +167,5 @@ CSmartError::checkVolts(float ipVolts, float glowI, bool throwfault)
uint8_t
CSmartError::getError()
{
if(_Error) {
return _Error;
}
return 0;
return _Error;
}