Posts made by GeorgeDumitru

@jan-reitinger can you direct me to some documentation that shows how to actually use Trace() as I could definitely use that for myself too.

@jan-reitinger said in ASCII Commands Over RS485:

buf2double

Hi, the number is not in floating-point format, is actually an int. But what I don't understand is how to use your function What exactly does it take in the argument. I never seen a function taking anything like yours and if I call just double myDouble = buf2double(myBuffer) I expect 100.000 and I get -7.403 669 410 330E-171 . So, how exacttly do i solve this?

Can you please help me with a conversion? I need to interrogate the position of the stepper motor, they have an ascii command I can send to do that, but the response is a 28-bit number. Can you tell me what I can use to get that number from the buffer?

@jan-reitinger said in ASCII Commands Over RS485:

trol statement in the log, use Trace(1,data). If you want the string to output directly, this should work:

That's what I thought, but every time I try to do that I get this as an error:

@jan-reitinger Hi Jan, sorry if I'm being difficult here, but I am just curious, I am receiving a string in the return message. How can i process that to have the string in the output of the block? I managed to get a response from the device, and as long as the response is a single byte, that works just fine, but I am struggling to get a string out of the buffer. Do you have any suggestions?

@jan-reitinger Hi Jan, here is the code of the entire block:

#define COM_BAUDRATE 9600 //baudrate, e.g. 9600, 19200, 57600, 115200
#define COM_PARITY_NONE 0 //no parity
#define COM_PARITY_ODD  1  //odd parity
#define COM_PARITY_EVEN 2  //even parity

#define BUFFER_SIZE 20 // MAXIMUM NUMBER OF BYTES TO SEND
#define COMMAND_LENGTH_MAX 20 //maximum length of command

//Assigning parameters to variables, these variables are read-only;
string parameter(0) serialdevice;//serial device is defined by parameter p0 of the REXLANG Block (e.g. /dev/ttyS0 in Linux or COM1 in Windows)

//Assigning inputs to variables
bool input(0) IsGreenButtonSignalOn;
bool input(1) IsRedButtonSignalOn;
bool input(2) IsYellowButtonSignalOn;
bool input(3) IsProcedureStandardSignal;

//Assigning Variables to Outputs, these variables are WRITE-Only
bool output(0) IsDeviceReady;
bool output(1) IsDeviceInError;
bool output(2) IsDeviceRunning;
string output(3) ResponseFromDMX;
long output(14) DebugMessage;
long output(15) ConnectionStatus;

//Variables Declaration
const long cr = 13; 	  // (cr) is the termination character, carrige return (0Dh);
long hCom, s, receive;	  // Communication Handle
long buffer[BUFFER_SIZE]; // buffer for incoming data
long dataCount; 		  // Number of bytes sent
bool read = true;
string data[BUFFER_SIZE+1];
int status=0;
long a;

void HomeMotor(void){
	long readData[6];
	readData[0]='L';
	readData[1]='H';
	readData[2]='O';
	readData[3]='M';
	readData[4]='E';
	readData[5]='-';
	s=Send(hCom,readData,6);
	return;
}


void ClearError(void){
	a=Write(hCom,"@DMK01EO=1[CR]");
	if(a>0){
		DebugMessage=a;
	}
	else{
		DebugMessage=-1;
	}
}
void MoveTo1000(void){
	a=Write(hCom,"@01J+");
	if(a>0){
		DebugMessage=a;
		status=0;
	}
	else{
		DebugMessage=-1;
	}
}

//the init procedure is executed once when the REXLANG function block initializes
long init(void)
{
	/* PUT YOUR CODE HERE */
	hCom=-1;
	

	
	return 0;
}

//the main procedure is executed repeatedly (once in each sampling period)
long main(void)
{
	/* PUT YOUR CODE HERE */
	if(hCom<0)
	{
		hCom = OpenCom(serialdevice,COM_BAUDRATE,COM_PARITY_NONE); //Opening Serial Device
		ConnectionStatus=hCom;
	}	
	switch(status)
	{
		case 0:
			a=Write(hCom,"@00EO[CR]");
			if(a>0){
				status=1;
			}
			break;
		case 1:
			dataCount = Read(hCom, data,BUFFER_SIZE);
			if(dataCount>0){
				if(data=="1"){
					ResponseFromDMX="ON";
				}
				else{
					ResponseFromDMX="OFF";
				}
				status = 0;
			}
		default:
			break;

	}

	return 0;
}

//the exit procedure is executed once when the task is correctly terminated
// (system shutdown, downloading new control algorithm, etc.)
long exit(void)
{
	/* PUT YOUR CODE HERE */
	if(hCom>=0){
		Close(hCom);
	}
	return 0;
}

@jan-reitinger Hi Jan, the write is successful but the read doesn't return anything. This is where I always have issues. For some reason the read almost always misses the replay from the device.

@jan-reitinger As for why am I using a USB <-> RS-485, it was not my decision. If that is not going to meet my requirements in terms of speed, I will change it, but this is a project I jumped in kind of in the middle, after all the wiring and setup has been completed and I had nothing to say about it.

@jan-reitinger said in ASCII Commands Over RS485:

te command was successful (see the error codes in the REXLANG doc for Write() function). The value of a will be the number of bytes that were written to the device.

Hi Jan, this is amazingly helpful. I just couldn't figure it out from the block documentation. This was exactly the pointer in the right direction I needed. Thank you very much!

Hi I am currently working on a project where I want to use a MonarcoHAT to control a DMX-K-SA-17 stepper motor controller. The two devices are communicating over RS-485 serial com (I Am using a USBtoRS485 connection). The DMX-K-SA-17 can be controlled using ASCII Commands. I have been struggling for a few weeks now to find a proper REXLANG Routine that will allow me to :
a. Send commands in ascii format to the device
b. Get the response of those commands once the command has been sent.

Can anyone help me with this?

Hello guys,

Can any of you help me understand how to consume the api in a c# .net app? i have tried the httpclient method and all i get is the app saying that the authentication certificate is not valid. do you have any suggestions?

Hi Guys,

Can any of you tell me what should i do to read the value of the TRND block y parameters from an external c#.net application? I keep getting issues trying to access the api through HttpClient by telling me the security certificate is not authentic. Can you please advise on this?

Hi guys,

Can any of you tell me if it is possible to use a database value as the value of TIMER_ pt? it sort of works with "refresh_from" in WebBuDi" but i still need to push enter to actually have it using it as the value of the TIMER_ pt. Is there any way of forcing that automatically?

Thank you for your support.

Hi everybody,

Does any of you how to use a single input pox in the WebBuDi to set the pt for 3 different timers? I tried to look it up in the manuals but i couldn't find anything. does any of you have any idea if it is at least possible?