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01-25-15, 03:23 PM
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#22 |
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Master EcoRenovator
Join Date: Mar 2014
Location: Florissant, Colorado
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http://www.taco-hvac.com/uploads/Fil...ves003-008.pdf
Updated code Code:
/********************************************************
*
* ARDUINO Taco 008 Flow.
*
* In Setup, Source & Load pumps are set OFF
* , read Source pump static pressure, convert to Feet of Head & save
* , read Load pump static pressure, convert to Feet of Head & save
*
* In Void Loop, Source & Load pumps are set ON
* , read Source pump ON pressure , convert to Feet of Head
* , calculate Source pump Delta pressure (ON - OFF)
* , estimate Source pump GPM
*
* , read Load pump ON pressure , convert to Feet of Head
* , calculate Load pump Delta pressure (ON - OFF)
* , estimate Load pump GPM
* Repeat
*
*
* Change History:
* 01/27/15 Coded
*
*
*
********************************************************/
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define DEBUG 1
//#define DEBUG 0
#define I2C_ADDR 0x3F // <<----- Add your address here. Find it from I2C Scanner
//D3
#define BACKLIGHT_PIN 3 //define LCD digital pins
#define En_pin 2
#define Rw_pin 1 //can't use D0 & D1 Tx, Rx
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5 //can use D2 -> D12 below in code
#define D6_pin 6
#define D7_pin 7
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
#define SDA A4 //RESERVE I2C for LCD
#define SCL A5
// pinMode(A0, OUTPUT); //This works acording
// http://arduino.cc/en/Tutorial/AnalogInputPins
// digitalWrite(A0, HIGH); //
#define Source_Pump_relay_pin 2 // D2 Buffer tank Pump Relay D1102 2.5A
#define Load_Pump_relay_pin 3 // D3 Buffer tank Pump Relay D1102 2.5A
#define Source_pump_sensor_pin A0 //
#define Load_pump_sensor_pin A1 //
float Src_on_head, Load_on_head;
float Src_on_delta_head, Load_on_delta_head;
float Src_off_head, Load_off_head;
float Src_on_flow, Load_on_flow;
int I, W, Y;
void setup(void) //Start Setup
{
pinMode (Source_pump_sensor_pin, INPUT);
pinMode (Load_pump_sensor_pin, INPUT);
pinMode (Source_Pump_relay_pin, OUTPUT);
pinMode (Load_Pump_relay_pin, OUTPUT);
// Serial.begin(9600); // start serial communication
// delay(10000); //time to enable monitor window
// Serial.println(F("........Hello world!......."));
// delay(100);
lcd.begin (16,2); // <<----- My LCD is 16x2
lcd.clear();
//Switch on the backlight
lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
lcd.setBacklight(HIGH);
lcd.clear();
lcd.home (); // go home
lcd.print(F("008 FLOW"));
delay(10000);
if(DEBUG)
{
lcd.clear();
lcd.home (); // go home
lcd.print(F("DEBUG = ON"));
delay(10000);
}
else
{
lcd.clear();
lcd.home (); // go home
lcd.print(F("DEBUG = OFF"));
delay(10000);
}
digitalWrite (Source_Pump_relay_pin, HIGH); //Source Pump OFF
digitalWrite (Load_Pump_relay_pin, HIGH); //Load Pump OFF
delay(10000);
W = analogRead(Source_pump_sensor_pin); //read Src pump off pressure
if(DEBUG){ W = 500;}
Src_off_head = convert_raw_sensor_to_head(W);
lcd.clear();
lcd.home (); // go home
lcd.print(F("SRC_PUMP_OFF_HD"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Src_off_head);
lcd.print(F(" Feet"));
delay(10000);
W = analogRead(Load_pump_sensor_pin); //read Load pump off pressure
if(DEBUG){ W = 500;}
Load_off_head = convert_raw_sensor_to_head(W);
lcd.clear();
lcd.home (); // go home
lcd.print(F("LOAD_PUMP_OFF_HD"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Load_off_head);
lcd.print(F(" Feet"));
delay(10000);
} //end setup
void loop ()
{
digitalWrite (Source_Pump_relay_pin, LOW); //Source Pump ON
digitalWrite (Load_Pump_relay_pin, LOW); //Load Pump ON
delay(10000);
W = analogRead(Source_pump_sensor_pin); //read Src pump ON pressure
if(DEBUG){ W = 600;}
Src_on_head = convert_raw_sensor_to_head(W);
lcd.clear();
lcd.home (); // go home
lcd.print(F("SRC_PUMP_ON_HD"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Src_on_head);
lcd.print(F(" Feet"));
delay(10000);
Src_on_delta_head = Src_on_head - Src_off_head;
lcd.clear();
lcd.home (); // go home
lcd.print(F("SRC_PUMP_ON_DLT"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Src_on_delta_head);
lcd.print(F(" Feet"));
delay(10000);
Src_on_flow = estimate_008_flow(Src_on_delta_head);
if (Src_on_flow == -1)
{
lcd.clear();
lcd.home (); // go home
lcd.print(F("SRC_DELTA_HD_NG"));
lcd.setCursor(0,1);
lcd.print(F("HANG_FOREVER_1"));
do{Y = Y;} while (Y == Y); //hang forever
}
lcd.clear();
lcd.home (); // go home
lcd.print(F("SRC_P_ON_FLOW"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Src_on_flow);
lcd.print(F(" GPM"));
delay(10000);
W = analogRead(Load_pump_sensor_pin); //read Load pump ON pressure
if(DEBUG){ W = 650;}
Load_on_head = convert_raw_sensor_to_head(W);
lcd.clear();
lcd.home (); // go home
lcd.print(F("LOAD_PUMP_ON_HD"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Load_on_head);
lcd.print(F(" Feet"));
delay(10000);
Load_on_delta_head = Load_on_head - Load_off_head;
lcd.clear();
lcd.home (); // go home
lcd.print(F("LOAD_PUMP_ON_DLT"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Load_on_delta_head);
lcd.print(F(" Feet"));
delay(10000);
Load_on_flow = estimate_008_flow(Load_on_delta_head);
if (Load_on_flow == -1)
{
lcd.clear();
lcd.home (); // go home
lcd.print(F("LOAD_DELTA_HD_NG"));
lcd.setCursor(0,1);
lcd.print(F("HANG_FOREVER_2"));
do{Y = Y;} while (Y == Y); //hang forever
}
lcd.clear();
lcd.home (); // go home
lcd.print(F("LOAD_P_ON_FLOW"));
lcd.setCursor(0,1);
lcd.print(F("= "));
lcd.print(Load_on_flow);
lcd.print(F(" GPM"));
delay(10000);
} //end forever loop
float convert_raw_sensor_to_head(float Raw)
{
//Pressure sensor output .5v = 0 PSI, 4.5v = 30 PSI
//analogRead results .5v = 102, 4.5v = 921
#define PSI_0 102
#define PSI_30 921
#define PSI_max 30
#define Convert_psi_to_head 2.31
return ((((Raw - PSI_0) / (PSI_30 - PSI_0)) * PSI_max) * Convert_psi_to_head);
}
float estimate_008_flow(float Delta_head)
{
/*
* http://www.taco-hvac.com/uploads/Fil...ves003-008.pdf
*
* Pretty tricky array usage, the array element values (feet of head)
* are taken from the Taco 008 pump performance curve Y-axis
* at each GPM along X-axis,
* array index is whole GPM along X-axis
*
* Flow in GPM is returned to caller after interpolation between
* whole GPM values along X-axis,
* or ERROR is returned (-1) if "out of array bounds"
* ie. not between array highest & lowest head values
*
*/
#define Array_size 16
float Array_008 [Array_size] = {15.25,15.05,14.8,14.35,13.75,13.15,12.35,
11.3,10.4,9.15,7.8,6.45,4.8,3.1,1.3, -1.0};
float Val, Next_val, Span, GPM;
if ((Delta_head < Array_008[0]) && (Delta_head > 0)) //Bounds check
{
// in bounds, continue
for (I=0; I< Array_size; I++) //Scan array to find where Delta_head falls
{
Val = Array_008[I]; //get array value
Next_val = Array_008[I+1]; //get Next array value
Span = Val - Next_val; //Calc Span
if((Delta_head <= Val) && (Delta_head >= Next_val)){break;}
} //end for loop when Delta_head falls between elements, I = whole GPM
GPM = (I + ((Val - Delta_head) / Span)); //interpolate to get decimals
return (GPM); // return GPM
} //end if in bounds
else {return (-1);} // error return, out of bounds
} // end of estimate_008_flow
Last edited by buffalobillpatrick; 01-28-15 at 12:03 PM.. |
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