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thenorthstar
Joined: 06 Mar 2010
Posts: 24
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| Modbus Master Cart Problem. Please Help me |
 Posted: Sun May 22, 2011 11:26 am |
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Hello Friends.
I did two Slave and Master Card.
The first trial:
The first card is slave and the pc as a master , when I try running the code, I also heated the slave on the LM35 and the temperature reading from the PC with Modbus Poll Master simulation program.
The second trial:
The second card is master and the pc as a slave , when I try running the code,
and test in the pc with Modbus Slave simulation Program master code did not work.
The third trial:
Master and Slave cards to each other Connect with Modbus but the communication did not work.
I set up as a slave on the two cards and PC as a master. Two cards work as a slave.
Is there an error codes? I could not find.
Look you have the possibility Please. 
However, it works flawlessly in Proteus.
My Master code:
| Code: |
#include <18f4620.h>
#fuses XT,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD
#use delay(clock=10000000)
#use fast_io(a)
#use fast_io(d) //Port yönlendirme komutları D portu için geçerli
#define MODBUS_TYPE MODBUS_TYPE_MASTER
#define MODBUS_SERIAL_TYPE MODBUS_RTU
#define MODBUS_SERIAL_RX_BUFFER_SIZE 64
#define MODBUS_SERIAL_BAUD 38400
#define MODBUS_SERIAL_RX_PIN PIN_C7
#define MODBUS_SERIAL_TX_PIN PIN_C6
#define MODBUS_SERIAL_ENABLE_PIN PIN_D2
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_RDA
#include <modbus.c>
#define MODBUS_SLAVE_ADDRESS 01
#include "2x16_4x20_LCD.c"
int i;
int1 HataVar = 0;
int1 HataEkrani = 0;
/*This function may come in handy for you since MODBUS uses MSB first.*/
int8 swap_bits(int8 c)
{
return ((c&1)?128:0)|((c&2)?64:0)|((c&4)?32:0)|((c&8)?16:0)|((c&16)?8:0)
|((c&32)?4:0)|((c&64)?2:0)|((c&128)?1:0);
}
void read_all_holding()
//!{
//!
//!if(!(modbus_read_holding_registers(MODBUS_SLAVE_ADDRESS,0,8)))
//! {
//! //*Started at 1 since 0 is quantity of coils
//! LCD_gotoxy(1,1);
//! printf(lcd_putc,"Write/Read OK");
//! for(i=1; i < (modbus_rx.len); ++i)
//! LCD_gotoxy(2,2);
//! int16 Sicaklik = (int16)modbus_rx.data[1] * 256 + (int16)modbus_rx.data[2];
//! int16 Sicaklik2 = (int16)modbus_rx.data[3] * 256 + (int16)modbus_rx.data[4];
//! int16 Sicaklik3 = (int16)modbus_rx.data[5] * 256 + (int16)modbus_rx.data[6];
//!
//! printf(lcd_putc,"Temp=%3.1f ",(float)Sicaklik/10);
//! LCD_gotoxy(2,3);
//! printf(lcd_putc,"Temp=%3.1f ", (float)Sicaklik2/10);
//!// LCD_gotoxy(2,4);
//!// printf(lcd_putc,"Temp=%3.1u", modbus_rx.data[6]);
//!
{
int SLAVE_ID;
int16 Temp1,Temp2;
if(!(modbus_read_holding_registers(MODBUS_SLAVE_ADDRESS,0,8))) // Burda tüm word dataları okuyor
{
/*Started at 1 since 0 is quantity of coils*/
Temp1=(int16)modbus_rx.data[1] * 256 + (int16)modbus_rx.data[2];//(modbus_rx.data[1]*256)+modbus_rx.data[2];
Temp2=(int16)modbus_rx.data[3] * 256 + (int16)modbus_rx.data[4];//(modbus_rx.data[3]*256)+modbus_rx.data[4];
SLAVE_ID=modbus_rx.data[6];
LCD_gotoxy(1,1); printf(lcd_putc,"Write/Read OK");
LCD_gotoxy(1,2); printf(lcd_putc,"SLAVE ID=%d",SLAVE_ID);
LCD_gotoxy(1,3); printf(lcd_putc,"Temp1=%3.1f",(float)Temp1/10);
// }
}
else
{
HataVar = 1;
HataEkrani = 0;
}
}
/*void write_coils()
{
int8 coils[1]={0};
int Role;
if(input(PIN_D0)==0) // Read the switch
{
(bit_set(coils[0],1));
role=1;
}
else
{ (bit_clear(coils[0],1));
role=0;
}
delay_ms(10); // Debounce period
if(!(modbus_write_multiple_coils(MODBUS_SLAVE_ADDRESS,0,8,coils)))
{
if(Role==1) // Read the switch
{
LCD_gotoxy(2,4);
printf(lcd_putc,"Role1=%i Açık ",Role,);
}
else
{
LCD_gotoxy(2,4);
printf(lcd_putc,"Role1=%i Kapalı",Role,);
}
}
else
{
HataVar = 1;
HataEkrani = 0;
}
}*/
//=============================================================================
//!void read_all_inputs()
//!{
//!
//! if(!(modbus_read_discrete_input(MODBUS_SLAVE_ADDRESS,0,8)))
//! {
//!
//! /*Started at 1 since 0 is quantity of coils*/
//! for(i=1; i < (modbus_rx.len); ++i)
//!
//! }
//! else
//! {
//!
//! }
//!}
//=============================================================================
void main()
{
setup_adc_ports(NO_ANALOGS);
set_tris_d(0b00000011);
modbus_init();
lcd_init();
while ( true )
{
if (HataEkrani ==0 && HataVar == 1)
{
LCD_gotoxy(2,3);
printf(lcd_putc,"\fModbus Hata");
LCD_gotoxy(3,4);
printf(lcd_putc,"Error=%D ", modbus_rx.error);
HataEkrani = 1;
}
read_all_holding();
// write_coils();
}
}
|
My slave Code:
| Code: |
//================================================================================
#include <18F452.h>
#device ADC=10 // 10 bitlik ADC
#fuses HS, NOWDT,NOLVP, NOPROTECT,NOBROWNOUT, NOPUT, STVREN, NODEBUG, NOWRT, NOWRTD, NOWRTB, NOWRTC, NOCPD, NOCPB, NOEBTR, NOEBTRB
#use delay(clock=10000000)
#use fast_io(a)
#define MODBUS_TYPE MODBUS_TYPE_SLAVE
#define MODBUS_SERIAL_RX_BUFFER_SIZE 64
#define MODBUS_SERIAL_BAUD 38400
#define MODBUS_SERIAL_RX_PIN PIN_C7
#define MODBUS_SERIAL_TX_PIN PIN_C6
#define MODBUS_SERIAL_ENABLE_PIN PIN_C5
#define MODBUS_SERIAL_RX_ENABLE PIN_C5 // Controls RE pin for RS485 transceiver
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_RDA
#define MODBUS_SERIAL_TYPE MODBUS_RTU // use MODBUS_ASCII for ASCII mode
#include <modbus.c>
#define MODBUS_ADDRESS 01
#include "2x16_4x20_LCD.c"
//=============================================================================
#define OUT1 PIN_C0
#define OUT2 PIN_C1
#define OUT3 PIN_E1
#define OUT4 PIN_E2
//=============================================================================
int8 coils = 0b00000000;
int8 inputs = 0b00000000;
int16 hold_regs[] = {0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000};
int16 input_regs[] = {0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000};
int16 event_count = 0;
unsigned long int Ham_Deger,Ham_Deger2;
float Temp,sicaklik,Temp2,sicaklik2;
int32 sayi=0; // Tamsayı tipinde değişken tanımlanıyor
int a,i;
/*This function may come in handy for you since MODBUS uses MSB first.*/
int8 swap_bits(int8 c)
{
return ((c&1)?128:0)|((c&2)?64:0)|((c&4)?32:0)|((c&8)?16:0)|((c&16)?8:0)
|((c&32)?4:0)|((c&64)?2:0)|((c&128)?1:0);
}
void LM35_Oku ()
{
set_adc_channel( 0 );
delay_us(10);
Ham_Deger=read_adc();
Temp=(0.0048828125*Ham_Deger)*1000; // Dijitale çevirme işlemine uğrayan sinyalin mV olarak gerilimi hesaplanıyor
sicaklik=(Temp/10); // Her 10mV'ta 1 derece artma
LCD_gotoxy(1,2); // gönderilmek
printf(lcd_putc,"Temp1=%5.1f'C",sicaklik);
}
void LCD_OKU ()
{
LCD_gotoxy(3,1);
printf(lcd_putc,"SLAVE ID=%d",MODBUS_ADDRESS);
}
void main()
{
setup_adc(adc_clock_div_32); // ADC clock frekansı fosc/32
setup_adc_ports(ALL_ANALOG);
delay_ms(10); //1 sn bekle
modbus_init();
lcd_init();
OUT2==0;
while(TRUE)
{
LM35_Oku ();
LCD_OKU ();
// Sicaklik = Sicaklik * 10;
hold_regs[0]=Sicaklik*10;
hold_regs[1]=Sicaklik2*10;
hold_regs[2]=MODBUS_ADDRESS;
//! if (INPUT(OUT1) == 1)
//! bit_set(inputs,0);
//! else
//! bit_clear(inputs,0);
if (bit_test(coils,0) == 1)
OUTPUT_HIGH(OUT1);
else
OUTPUT_LOW(OUT1);
if (bit_test(coils,1) == 1)
OUTPUT_HIGH(OUT2);
else
OUTPUT_LOW(OUT2);
if (bit_test(coils,2) == 1)
OUTPUT_HIGH(OUT3);
else
OUTPUT_LOW(OUT3);
if (bit_test(coils,3) == 1)
OUTPUT_HIGH(OUT4);
else
OUTPUT_LOW(OUT4);
while(!modbus_kbhit());
delay_us(50);
//check address against our address, 0 is broadcast
if((modbus_rx.address == MODBUS_ADDRESS) || modbus_rx.address == 0)
{
switch(modbus_rx.func)
{
case FUNC_READ_COILS: //read coils
case FUNC_READ_DISCRETE_INPUT: //read inputs
if(modbus_rx.data[0] || modbus_rx.data[2] ||
modbus_rx.data[1] >= 8 || modbus_rx.data[3]+modbus_rx.data[1] > 8)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_ADDRESS);
else
{
int8 data;
if(modbus_rx.func == FUNC_READ_COILS)
data = coils>>(modbus_rx.data[1]); //move to the starting coil
else
data = inputs>>(modbus_rx.data[1]); //move to the starting input
data = data & (0xFF>>(8-modbus_rx.data[3])); //0 out values after quantity
if(modbus_rx.func == FUNC_READ_COILS)
modbus_read_coils_rsp(MODBUS_ADDRESS, 0x01, &data);
else
modbus_read_discrete_input_rsp(MODBUS_ADDRESS, 0x01, &data);
event_count++;
}
break;
case FUNC_READ_HOLDING_REGISTERS:
case FUNC_READ_INPUT_REGISTERS:
if(modbus_rx.data[0] || modbus_rx.data[2] ||
modbus_rx.data[1] >= 8 || modbus_rx.data[3]+modbus_rx.data[1] > 8)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_ADDRESS);
else
{
if(modbus_rx.func == FUNC_READ_HOLDING_REGISTERS)
modbus_read_holding_registers_rsp(MODBUS_ADDRESS,(modbus_rx.data[3]*2),hold_regs+modbus_rx.data[1]);
else
modbus_read_input_registers_rsp(MODBUS_ADDRESS,(modbus_rx.data[3]*2),input_regs+modbus_rx.data[1]);
event_count++;
}
break;
case FUNC_WRITE_SINGLE_COIL: //write coil
if(modbus_rx.data[0] || modbus_rx.data[3] || modbus_rx.data[1] > 8)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_ADDRESS);
else if(modbus_rx.data[2] != 0xFF && modbus_rx.data[2] != 0x00)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_VALUE);
else
{
//coils are stored msb->lsb so we must use 7-address
if(modbus_rx.data[2] == 0xFF)
bit_set(coils,modbus_rx.data[1]);
else
bit_clear(coils,modbus_rx.data[1]);
modbus_write_single_coil_rsp(MODBUS_ADDRESS,modbus_rx.data[1],((int16)(modbus_rx.data[2]))<<8);
event_count++;
}
break;
case FUNC_WRITE_SINGLE_REGISTER:
if(modbus_rx.data[0] || modbus_rx.data[1] >= 8)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_ADDRESS);
else
{
//the registers are stored in little endian format ///////======///
hold_regs[modbus_rx.data[1]] = make16(modbus_rx.data[2],modbus_rx.data[3]);
modbus_write_single_register_rsp(MODBUS_ADDRESS,
make16(modbus_rx.data[0],modbus_rx.data[1]),
make16(modbus_rx.data[2],modbus_rx.data[3]));
}
break;
case FUNC_WRITE_MULTIPLE_COILS:
if(modbus_rx.data[0] || modbus_rx.data[2] ||
modbus_rx.data[1] >= 8 || modbus_rx.data[3]+modbus_rx.data[1] > 8)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_ADDRESS);
else
{
int i,j;
modbus_rx.data[5] = swap_bits(modbus_rx.data[5]);
for(i=modbus_rx.data[1],j=0; i < modbus_rx.data[1]+modbus_rx.data[3]; ++i,++j)
{
if(bit_test(modbus_rx.data[5],j))
bit_set(coils,7-i);
else
bit_clear(coils,7-i);
}
modbus_write_multiple_coils_rsp(MODBUS_ADDRESS,
make16(modbus_rx.data[0],modbus_rx.data[1]),
make16(modbus_rx.data[2],modbus_rx.data[3]));
event_count++;
}
break;
case FUNC_WRITE_MULTIPLE_REGISTERS:
if(modbus_rx.data[0] || modbus_rx.data[2] ||
modbus_rx.data[1] >= 8 || modbus_rx.data[3]+modbus_rx.data[1] > 8)
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_DATA_ADDRESS);
else
{
int i,j;
for(i=0,j=5; i < modbus_rx.data[4]/2; ++i,j+=2)
hold_regs[i] = make16(modbus_rx.data[j],modbus_rx.data[j+1]);
modbus_write_multiple_registers_rsp(MODBUS_ADDRESS,
make16(modbus_rx.data[0],modbus_rx.data[1]),
make16(modbus_rx.data[2],modbus_rx.data[3]));
event_count++;
}
break;
default: //We don't support the function, so return exception
modbus_exception_rsp(MODBUS_ADDRESS,modbus_rx.func,ILLEGAL_FUNCTION);
}
}
}
}
//=====================================================================================
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The files here:
http://www.4shared.com/file/b4p3Js7F/Mod_Master_Slave.html
Last edited by thenorthstar on Mon May 23, 2011 12:41 am; edited 1 time in total |
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temtronic
Joined: 01 Jul 2010
Posts: 9170
Location: Greensville,Ontario
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| Posted: Sun May 22, 2011 5:46 pm |
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Do yourself a HUGE favour..get RID of Proteus !!
If you hardware is connected as in the schematic, it'll never work. I stopped at 15 , the errors I could easily see.
Cut real code, burn real PICs, test in the real world.Only then will you really learn what's going on.
As far as your code, I wouldn't use Modbus for the task,far easier ways to do it !
Get rid of the use-fast-io code unles you've got 4-5 years of PIC programing, it'll cause you a LOT of problems.
Also I don't see any serial communications...though you're program is 'messy'.
Also how do you handle any of the internal peripherals that share the I/O pins you'r using??? |
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thenorthstar
Joined: 06 Mar 2010
Posts: 24
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| Posted: Mon May 23, 2011 12:46 am |
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I'm sorry. Edit Link and codes. I added all the files.
Do you have a problem with the connection? |
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