USB RS232 adapter

[8run0tti]

Dear ctrlX Community!

We would like to connect several Keyence scanner to ctrlX Core via USB RS232 adapter.

I successfully sent and received data in node-RED (with /dev/ttyUSB0 path), but we need to use this solution in PLC runtime.

I tried to open the serial port with SysCom library without any success.

Is there any possibility to handle the USB RS232 adapter in the PLC environment?

Thanks in advance!

[MauroRiboniMX]

Hi,

I don't know if it is possible or not but i would like to know the answer too. 🤗

Mauro

[TheCodeCaptain]

Hi,

we will have a look into the topic and come back to you.

Have a nice weekend.

[8run0tti]

After the V1.14 update, we tried to set the following parameters to plc_system.cfg:

[syscom]
linux.devicefile=/dev/ttyUSB0
portnum := COM.SysCom.SYS_COMPORT1;

This solution works with Codesys PLC runtime on Raspberry Pi, but no success on ctrlX.

Is there any chance to step forward in this question?

[TheCodeCaptain]

Hi 8run0tti,

update, it is not yet possible to use it.

We are working on it, most likely it will be available in the next version 1.16 from august on.

Regards

[CodeShepherd]

Any news here?

[TheCodeCaptain · Accepted solution]

Hi 8run0tti,

we implemented the support from version 1.16 on.

Find here some example code.

PROGRAM PLC_PRG
VAR	
	result		:	Syscom.RTS_IEC_RESULT;
	handle		:	Syscom.RTS_IEC_HANDLE;
	settings	:	Syscom.SysComSettings;
	bDone		:	BOOL;
	arByte		:	ARRAY[0..99]	OF	BYTE;
	udiReturn	:	UDINT;
	iState		:	INT	:=	0;
END_VAR

settings.sPort		:=	SYS_COMPORT1;
settings.ulBaudrate	:=	SYS_BR_4800;
settings.byParity	:=	SYS_NOPARITY;
settings.byStopBits	:=	SYS_ONESTOPBIT;

CASE iState OF

0:
	IF NOT bDone THEN
		handle := Syscom.SysComOpen2(
						pSettings:= ADR(settings),
						pSettingsEx:= 0,
						pResult:= ADR(result));
		bDone := TRUE;
		iState:= 10;
	END_IF

10:
	udiReturn := Syscom.SysComRead(
		hCom:= handle, 
		pbyBuffer:= ADR(arByte), 
		ulSize:= SIZEOF(arByte), 
		ulTimeout:= 0, 
		pResult:= ADR(result));
	
END_CASE

[MauroRiboniMX]

Thanks kai ❤️