private void InstantiateDefaultPIDSettingsInstances()
{
initial_defaults = new PIDSettings();
empty_air_defaults = new PIDSettings();
empty_n2_defaults = new PIDSettings();
quarter_full_air_defaults = new PIDSettings();
quarter_full_n2_defaults = new PIDSettings();
half_full_air_defaults = new PIDSettings();
half_full_n2_defaults = new PIDSettings();
threequarters_full_air_defaults = new PIDSettings();
threequarters_full_n2_defaults = new PIDSettings();
full_air_defaults = new PIDSettings();
full_n2_defaults = new PIDSettings();
}
private void SetPIDDefaultFromDisplayButton_Click(object sender, EventArgs e)
{
switch (DefaultPIDSettingsSelectorComboBox.SelectedIndex)
{
case 0:
empty_air_defaults = GetPIDSettings_FromControls();
break;
case 1:
empty_n2_defaults = GetPIDSettings_FromControls();
break;
case 2:
quarter_full_air_defaults = GetPIDSettings_FromControls();
break;
case 3:
quarter_full_n2_defaults = GetPIDSettings_FromControls();
break;
case 4:
half_full_air_defaults = GetPIDSettings_FromControls();
break;
case 5:
half_full_n2_defaults = GetPIDSettings_FromControls();
break;
case 6:
threequarters_full_air_defaults = GetPIDSettings_FromControls();
break;
case 7:
threequarters_full_n2_defaults = GetPIDSettings_FromControls();
break;
case 8:
full_air_defaults = GetPIDSettings_FromControls();
break;
case 9:
full_n2_defaults = GetPIDSettings_FromControls();
break;
default:
initial_defaults = GetPIDSettings_FromControls();
break;
}
}
private void SetPIDSettings_ToControls(PIDSettings pid_settings)
{
this.CycleTimeInSecondsNumericUpDown.Value = (decimal)pid_settings.cycle_time_in_seconds;
this.OuterProportionalBandNumericUpDown.Value = (decimal)pid_settings.proportional_band_EachZone[0];
this.SampleZoneProportionalBandNumericUpDown.Value = (decimal)pid_settings.proportional_band_EachZone[1];
this.InnerProportionalBandNumericUpDown.Value = (decimal)pid_settings.proportional_band_EachZone[2];
this.OuterOffsetNumericUpDown.Value = (decimal)pid_settings.offset_EachZone[0];
this.SampleZoneOffsetNumericUpDown.Value = (decimal)pid_settings.offset_EachZone[1];
this.InnerOffsetNumericUpDown.Value = (decimal)pid_settings.offset_EachZone[2];
this.OuterRateNumericUpDown.Value = (decimal)pid_settings.rate_EachZone[0];
this.SampleZoneRateNumericUpDown.Value = (decimal)pid_settings.rate_EachZone[1];
this.InnerRateNumericUpDown.Value = (decimal)pid_settings.rate_EachZone[2];
this.OuterResetNumericUpDown.Value = (decimal)pid_settings.reset_EachZone[0];
this.SampleZoneResetNumericUpDown.Value = (decimal)pid_settings.reset_EachZone[1];
this.InnerResetNumericUpDown.Value = (decimal)pid_settings.reset_EachZone[2];
}
private PIDSettings GetPIDSettings_FromControls()
{
PIDSettings pid_settings = new PIDSettings();
pid_settings.cycle_time_in_seconds = (double)this.CycleTimeInSecondsNumericUpDown.Value;
pid_settings.proportional_band_EachZone[0] = (double)this.OuterProportionalBandNumericUpDown.Value;
pid_settings.proportional_band_EachZone[1] = (double)this.SampleZoneProportionalBandNumericUpDown.Value;
pid_settings.proportional_band_EachZone[2] = (double)this.InnerProportionalBandNumericUpDown.Value;
pid_settings.offset_EachZone[0] = (double)this.OuterOffsetNumericUpDown.Value;
pid_settings.offset_EachZone[1] = (double)this.SampleZoneOffsetNumericUpDown.Value;
pid_settings.offset_EachZone[2] = (double)this.InnerOffsetNumericUpDown.Value;
pid_settings.rate_EachZone[0] = (double)this.OuterRateNumericUpDown.Value;
pid_settings.rate_EachZone[1] = (double)this.SampleZoneRateNumericUpDown.Value;
pid_settings.rate_EachZone[2] = (double)this.InnerRateNumericUpDown.Value;
pid_settings.reset_EachZone[0] = (double)this.OuterResetNumericUpDown.Value;
pid_settings.reset_EachZone[1] = (double)this.SampleZoneResetNumericUpDown.Value;
pid_settings.reset_EachZone[2] = (double)this.InnerResetNumericUpDown.Value;
return(pid_settings);
}
private void SetPIDSettings_ToControls(PIDSettings pid_settings)
{
this.CycleTimeInSecondsNumericUpDown.Value = (decimal)pid_settings.cycle_time_in_seconds;
this.OuterProportionalBandNumericUpDown.Value = (decimal)pid_settings.proportional_band_EachZone[0];
this.SampleZoneProportionalBandNumericUpDown.Value = (decimal)pid_settings.proportional_band_EachZone[1];
this.InnerProportionalBandNumericUpDown.Value = (decimal)pid_settings.proportional_band_EachZone[2];
this.OuterOffsetNumericUpDown.Value = (decimal)pid_settings.offset_EachZone[0];
this.SampleZoneOffsetNumericUpDown.Value = (decimal)pid_settings.offset_EachZone[1];
this.InnerOffsetNumericUpDown.Value = (decimal)pid_settings.offset_EachZone[2];
this.OuterRateNumericUpDown.Value = (decimal)pid_settings.rate_EachZone[0];
this.SampleZoneRateNumericUpDown.Value = (decimal)pid_settings.rate_EachZone[1];
this.InnerRateNumericUpDown.Value = (decimal)pid_settings.rate_EachZone[2];
this.OuterResetNumericUpDown.Value = (decimal)pid_settings.reset_EachZone[0];
this.SampleZoneResetNumericUpDown.Value = (decimal)pid_settings.reset_EachZone[1];
this.InnerResetNumericUpDown.Value = (decimal)pid_settings.reset_EachZone[2];
}
private void SetPIDDefaultFromDisplayButton_Click(object sender, EventArgs e)
{
switch (DefaultPIDSettingsSelectorComboBox.SelectedIndex)
{
case 0:
empty_air_defaults = GetPIDSettings_FromControls();
break;
case 1:
empty_n2_defaults = GetPIDSettings_FromControls();
break;
case 2:
quarter_full_air_defaults = GetPIDSettings_FromControls();
break;
case 3:
quarter_full_n2_defaults = GetPIDSettings_FromControls();
break;
case 4:
half_full_air_defaults = GetPIDSettings_FromControls();
break;
case 5:
half_full_n2_defaults = GetPIDSettings_FromControls();
break;
case 6:
threequarters_full_air_defaults = GetPIDSettings_FromControls();
break;
case 7:
threequarters_full_n2_defaults = GetPIDSettings_FromControls();
break;
case 8:
full_air_defaults = GetPIDSettings_FromControls();
break;
case 9:
full_n2_defaults = GetPIDSettings_FromControls();
break;
default:
initial_defaults = GetPIDSettings_FromControls();
break;
}
}
private void InstantiateDefaultPIDSettingsInstances()
{
initial_defaults = new PIDSettings();
empty_air_defaults = new PIDSettings();
empty_n2_defaults = new PIDSettings();
quarter_full_air_defaults = new PIDSettings();
quarter_full_n2_defaults = new PIDSettings();
half_full_air_defaults = new PIDSettings();
half_full_n2_defaults = new PIDSettings();
threequarters_full_air_defaults = new PIDSettings();
threequarters_full_n2_defaults = new PIDSettings();
full_air_defaults = new PIDSettings();
full_n2_defaults = new PIDSettings();
}
private PIDSettings GetPIDSettings_FromControls()
{
PIDSettings pid_settings = new PIDSettings();
pid_settings.cycle_time_in_seconds = (double)this.CycleTimeInSecondsNumericUpDown.Value;
pid_settings.proportional_band_EachZone[0] = (double)this.OuterProportionalBandNumericUpDown.Value;
pid_settings.proportional_band_EachZone[1] = (double)this.SampleZoneProportionalBandNumericUpDown.Value;
pid_settings.proportional_band_EachZone[2] = (double)this.InnerProportionalBandNumericUpDown.Value;
pid_settings.offset_EachZone[0] = (double)this.OuterOffsetNumericUpDown.Value;
pid_settings.offset_EachZone[1] = (double)this.SampleZoneOffsetNumericUpDown.Value;
pid_settings.offset_EachZone[2] = (double)this.InnerOffsetNumericUpDown.Value;
pid_settings.rate_EachZone[0] = (double)this.OuterRateNumericUpDown.Value;
pid_settings.rate_EachZone[1] = (double)this.SampleZoneRateNumericUpDown.Value;
pid_settings.rate_EachZone[2] = (double)this.InnerRateNumericUpDown.Value;
pid_settings.reset_EachZone[0] = (double)this.OuterResetNumericUpDown.Value;
pid_settings.reset_EachZone[1] = (double)this.SampleZoneResetNumericUpDown.Value;
pid_settings.reset_EachZone[2] = (double)this.InnerResetNumericUpDown.Value;
return pid_settings;
}
// This function implements PID control in the oven, by using three
// USB-TC output channels. It calls the functions channel_out() to
// control the heater coils according to the known setup.
private void PID_control()
{
int count = 0;
oven_pid_settings = Program.pid_settings_form.ProgramPidSettings;
set_point_temperature = MaxTemp_copy;
double[] CurrentTemp_EachZone = new double[3] { 0, 0, 0 };
double[] PreviousTemp_EachZone = new double[3] { 0, 0, 0 };
int heat_increment_time_in_milliseconds = (int)((oven_pid_settings.cycle_time_in_seconds / 110) * 1000);
//Heat per each zone
int[] heat_EachZone = new int[3] { 0, 0, 0 };
//rate correction per each zone
double[] rate_correction_EachZone = new double[3] { 0, 0, 0 };
bool fill_n2_check = false;
bool n2_running_check = false;
bool outer_coil_on = false;
bool inner_coil_on = false;
bool sample_zone_coil_on = false;
SetOvenChannelOutput(OvenChanEnum.AllOff); // start with all oven channels off
SetAirRelayChannelOutput(AirChanStatusEnum.AirOff); //Start with air switched off
if (CoolMethod_copy == "1" &&
n2_running_check == false)
{
// Flow high pressure nitrogen for 10 seconds to fill
// the oven cavity with nitrogen
if (fill_n2_check == false)
{
count = 0;
SetAirRelayChannelOutput(AirChanStatusEnum.HighN2);
while (count <= 10)
{
Thread.Sleep(1000);
count++;
}
fill_n2_check = true;
SetAirRelayChannelOutput(AirChanStatusEnum.AirOff);
}
// Low pressure N2 trickle begins
SetAirRelayChannelOutput(AirChanStatusEnum.LowN2);
n2_running_check = true;
bool low_n2_adjusted = false;
while (!low_n2_adjusted)
{
MessageBox.Show(
"Please change the Low N2 Gauge Level (by twisting the Gauge now) until " +
"the black indicator bead is beween the two black arrows. ",
"Set Gauge Level",
MessageBoxButtons.OK);
DialogResult result =
MessageBox.Show(
"Is the Low N2 Gauge set to the correct level?",
"Verify Gauge Level",
MessageBoxButtons.YesNo);
if (result == System.Windows.Forms.DialogResult.Yes)
{
low_n2_adjusted = true;
}
}
}
EnableStartOvenButton start_oven_button_del = new EnableStartOvenButton(EnableStartCoolingButton);
StartCoolingButton.BeginInvoke(start_oven_button_del);
HeatingStarted = true;
while (oven_check == ComponentCheckStatusEnum.Running)
{
Heat_Time = DateTime.Now;
DateTime start_heat_increment;
DateTime end_heat_increment;
for (int i = 1; i <= 100; i++)
{
start_heat_increment = DateTime.Now;
if (heat_EachZone[0] > 0)
{
if (!outer_coil_on)
{
SetOvenChannelOutput(OvenChanEnum.Outer, OvenHeatOnOffEnum.On);
outer_coil_on = true;
}
}
else
{
SetOvenChannelOutput(OvenChanEnum.Outer, OvenHeatOnOffEnum.Off);
outer_coil_on = false;
}
if (heat_EachZone[1] > 0)
{
if (!sample_zone_coil_on)
{
SetOvenChannelOutput(OvenChanEnum.SampleZone, OvenHeatOnOffEnum.On);
sample_zone_coil_on = true;
}
}
else
{
SetOvenChannelOutput(OvenChanEnum.SampleZone, OvenHeatOnOffEnum.Off);
sample_zone_coil_on = false;
}
if (heat_EachZone[2] > 0)
{
if (!inner_coil_on)
{
SetOvenChannelOutput(OvenChanEnum.Inner, OvenHeatOnOffEnum.On);
inner_coil_on = true;
}
}
else
{
SetOvenChannelOutput(OvenChanEnum.Inner, OvenHeatOnOffEnum.Off);
inner_coil_on = false;
}
for (int j = 0; j < 3; j++)
{
heat_EachZone[j]--;
}
end_heat_increment = DateTime.Now;
TimeSpan heat_increment_duration = (end_heat_increment - start_heat_increment);
if (heat_increment_duration.TotalMilliseconds < heat_increment_time_in_milliseconds)
{
System.Threading.Thread.Sleep((int)(heat_increment_time_in_milliseconds - heat_increment_duration.TotalMilliseconds));
}
//If Set Temp Reached and Start Set Temp Hold Time not set
//Set Start Set Temp Hold Time
if (MaxTempPlateauReached &&
!MaxTemp_StartTime_Set)
{
MaxTemp_StartTime = DateTime.Now;
MaxTemp_StartTime_Set = true;
}
//If Set Temp Reached, then wait Hold Time till start cool down
//Use MaxTemp_StartTime to determine the curent duration of the Hold Peak Time
if (MaxTempPlateauReached)
{
TimeSpan peak_duration = DateTime.Now - MaxTemp_StartTime;
double hold_time_minutes = HoldTime_copy.TotalMinutes;
HoldTimeRemaining_copy = (hold_time_minutes - peak_duration.TotalMinutes).ToString("#0.0#");
HoldTimeRemainingTextBox.BeginInvoke((Action)(() => HoldTimeRemainingTextBox.Text = HoldTimeRemaining_copy));
if (peak_duration.TotalMinutes > hold_time_minutes)
{
oven_check = ComponentCheckStatusEnum.None;
}
}
}
//turn off oven heat outside of heating cycle
SetOvenChannelOutput(OvenChanEnum.OvenOff);
inner_coil_on = false;
outer_coil_on = false;
sample_zone_coil_on = false;
///////////////////////////////////////////////////////////////
//Set interlock for PID cycle reading temperature
IsLockedCurrentTemp_Array = true;
//Select Max Temperature on the Outer Zone of the Sample tray
CurrentTemp_EachZone[0] = Math.Max(CurrentTemperatures[0],
CurrentTemperatures[5]);
//Select Max Temperature at Sample Tray in Sample Zone
CurrentTemp_EachZone[1] = Math.Max(CurrentTemperatures[1],
CurrentTemperatures[4]);
//Select Max Temperature at Sample Tray in Inner Zone
CurrentTemp_EachZone[2] = Math.Max(CurrentTemperatures[2],
CurrentTemperatures[3]);
IsLockedCurrentTemp_Array = false;
for (int i = 0; i < 3; i++)
{
//Make sure a Previous Temp of Zero is never used
//this will throw off the rate correction parameter
if (PreviousTemp_EachZone[i] == 0)
PreviousTemp_EachZone[i] = CurrentTemp_EachZone[i];
//Calculate the rate correction - D in PID
rate_correction_EachZone[i] =
(PreviousTemp_EachZone[i] - CurrentTemp_EachZone[i]) * 100 * oven_pid_settings.rate_EachZone[i];
//Calculate the heat duty cycle % parameter from P, I, & D
heat_EachZone[i] =
(int)((100 / oven_pid_settings.proportional_band_EachZone[i]) *
(set_point_temperature - CurrentTemp_EachZone[i]) +
oven_pid_settings.offset_EachZone[i] +
rate_correction_EachZone[i]);
//Anti-windup - prevent I from incrementing unless we're heating
//and at set-point
if (heat_EachZone[i] < 100 &&
heat_EachZone[i] > 0 &&
rate_correction_EachZone[i] == 0)
oven_pid_settings.offset_EachZone[i] +=
(set_point_temperature - CurrentTemp_EachZone[i]) * oven_pid_settings.reset_EachZone[i];
//Store current temp to previous temp for next cycle's calculation of the
//Rate Correction (D) component.
PreviousTemp_EachZone[i] = CurrentTemp_EachZone[i];
}
}
oven_start_check = ComponentCheckStatusEnum.None;
//turn off oven heat outside of heating cycle
SetOvenChannelOutput(OvenChanEnum.OvenOff);
inner_coil_on = false;
outer_coil_on = false;
sample_zone_coil_on = false;
HeatingStopped = true;
MaxTempPlateauReached = false;
MaxTemp_StartTime_Set = false;
HeatingStarted = false;
HeatingStarted_logged = false;
MaxTempReached_logged = false;
//If not thread aborting, start cooling
if (oven_control_thread.ThreadState == ThreadState.AbortRequested ||
oven_control_thread.ThreadState == ThreadState.Aborted)
return;
if (oven_check == ComponentCheckStatusEnum.Aborted) return;
oven_cooling_check = ComponentCheckStatusEnum.Running;
DoOvenCooling();
}
