Έλεγχος MX2 omron inverter με RS485 modbus rtu

[misterno]

Η θα βρεις έτοιμη βιβλιοθήκη η θα υλοποιήσεις το πρωτόκολλο

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/**
* Modbus master example 1:
* The purpose of this example is to query an array of data
* from an external Modbus slave device. 
* The link media can be USB or RS232.
*
* Recommended Modbus slave: 
* diagslave http://www.modbusdriver.com/diagslave.html
*
* In a Linux box, run 
* "./diagslave /dev/ttyUSB0 -b 19200 -d 8 -s 1 -p none -m rtu -a 1"
* This is:
* serial port /dev/ttyUSB0 at 19200 baud 8N1
* RTU mode and address @1
*/

#include <ModbusRtu.h>

// data array for modbus network sharing
uint16_t au16data[16];
uint8_t u8state;

/**
* Modbus object declaration
* u8id : node id = 0 for master, = 1..247 for slave
* u8serno : serial port (use 0 for Serial)
* u8txenpin : 0 for RS-232 and USB-FTDI 
* or any pin number > 1 for RS-485
*/
Modbus master(0,0,9); // this is master and RS-232 or USB-FTDI, PIN 9 PARA INDICAR QUE TRASMITO

/**
* This is an structe which contains a query to an slave device
*/
modbus_t telegram;

unsigned long u32wait;

void setup() {
master.begin( 9600 ); // baud-rate at 19200
master.setTimeOut( 2000 ); // if there is no answer in 2000 ms, roll over
u32wait = millis() + 1000;
u8state = 0; 
}

void loop() {
switch( u8state ) {
case 0: 
if (millis() > u32wait) u8state++; // wait state
break;
case 1: 
telegram.u8id = 1; // slave address
telegram.u8fct = 5; // function code (this one is registers read)
telegram.u16RegAdd = 0; // start address in slave
telegram.u16CoilsNo = 2; // number of elements (coils or registers) to read
//telegram.au16reg = au16data; // pointer to a memory array in the Arduino

// PARA EL VARIADOR OMRON MX1: MODBUS RTU 01 05 00 00 FF 00 -> START
// 01 -> SLAVE (VFD OMRON)
// 05 -> WRITE COIL
// 00 00 -> ADDRESS COIL
// FF 00 -> VALUES TO WRITE IN the COIL FOR RUN


telegram.au16reg[0] = 0; 
telegram.au16reg[1] = 0;
telegram.au16reg[2] = 0;
telegram.au16reg[3] = 0;
telegram.au16reg[4] = 0;
telegram.au16reg[5] = 0;
telegram.au16reg[6] = 0;
telegram.au16reg[7] = 0;

telegram.au16reg[8] = 1;
telegram.au16reg[9] = 1;
telegram.au16reg[10] = 1;
telegram.au16reg[11] = 1;
telegram.au16reg[12] = 1;
telegram.au16reg[13] = 1;
telegram.au16reg[14] = 1;
telegram.au16reg[15] = 1;


master.query( telegram ); // send query (only once)
delay(3500);

telegram.u8id = 1; // slave address
telegram.u8fct = 6; // function code (this one is registers read)
telegram.u16RegAdd = 1; // start address in slave
telegram.u16CoilsNo = 4; // number of elements (coils or registers) to read
//telegram.au16reg = au16data; // pointer to a memory array in the Arduino
//telegram.au16reg = 0000000111110100;

// PARA EL VARIADOR OMRON MX1: MODBUS RTU 01 06 00 01 01 F4 -> CHANGE FQ
// 01 -> SLAVE (VFD OMRON)
// 06 -> WRITE IN REGISTE
// 00 01 -> REGISTER ADDRESS
// 01 F4 -> VALUE TO WRITE IN THE REGISTER TO CHANGE THE MOTOR FREQUENCY

telegram.au16reg[0] = 0;
telegram.au16reg[1] = 0;
telegram.au16reg[2] = 0;
telegram.au16reg[3] = 0;
telegram.au16reg[4] = 0;
telegram.au16reg[5] = 0;
telegram.au16reg[6] = 0;
telegram.au16reg[7] = 1;

telegram.au16reg[8] = 1;
telegram.au16reg[9] = 1;
telegram.au16reg[10] = 1;
telegram.au16reg[11] = 1;
telegram.au16reg[12] = 0;
telegram.au16reg[13] = 1;
telegram.au16reg[14] = 0;
telegram.au16reg[15] = 0;

master.query( telegram ); // send query (only once)
delay(3500);
telegram.u8id = 1; // slave address
telegram.u8fct = 5; // function code (this one is registers read)
telegram.u16RegAdd = 1; // start address in slave
telegram.u16CoilsNo = 2; // number of elements (coils or registers) to read
//telegram.au16reg = au16data; // pointer to a memory array in the Arduino

// PARA EL VARIADOR OMRON MX1: MODBUS RTU 01 05 00 00 00 00 -> STOP
// 01 -> SLAVE (VFD OMRON)
// 05 -> WRITE COIL
// 00 00 -> COIL'S ADDRESS
// 00 00 -> VALUE TO WRITE FOR STOP

telegram.au16reg[0] = 0;
telegram.au16reg[1] = 0;
telegram.au16reg[2] = 0;
telegram.au16reg[3] = 0;
telegram.au16reg[4] = 0;
telegram.au16reg[5] = 0;
telegram.au16reg[6] = 0;
telegram.au16reg[7] = 0;
telegram.au16reg[8] = 0;
telegram.au16reg[9] = 0;
telegram.au16reg[10] = 0;
telegram.au16reg[11] = 0;
telegram.au16reg[12] = 0;
telegram.au16reg[13] = 0;
telegram.au16reg[14] = 0;
telegram.au16reg[15] = 0;
master.query( telegram ); // send query (only once)
delay(3500);
u8state++;
break;
case 2:
master.poll(); // check incoming messages
if (master.getState() == COM_IDLE) {
u8state = 0;
u32wait = millis() + 100; 
}
break;
}
}

Ο κώδικας που βρήκα για το inverter omron MX2 είναι ο παραπάνω. Το θέμα είναι ότι δεν καταλαβαίνω πως δουλεύει. Ο δημιουργός του αναφέρει ότι δεν μπόρεσε να τον
κάνει να λειτουργήσει. Την βιβλιοθήκη την έχω εγκαταστήσει σωστά αλλά δεν αναφέρει την συνδεσμολογία του RE, DE στο ΜΑΧ485.
Πως αναλύει την εντολή MODBUS RTU 01 05 00 00 FF 00 -> START

Αν μπορεί κάποιος να βοηθήσει τον ευχαριστώ προκαταβολικά.