Dear all,
Hi, this is Jeong-moo Hwang from South Korea.
I would like to ask some questions regarding OPTA and 8 channels RS 485 Relay.
I did the code by using the Arduino PLC IDE. Plus, I set up the RS485 Serial Port, modbus address, Slave ID something like that. However, It does not work. Definitely, I though it is the problem of coding ST langauge.
If you do not mind, could you help me?
Thanks all.
Jeong-moo Hwang.
code as follow as :
humithreshold := 50.00;
tempthreshold := 25.00;
MbMRtuNetList[1].chn := MbChn_1;
MbMRtuNetList[1].adr := 2;
IF MbMRtuNetList[1].active = FALSE THEN
LEDG := FLASE;
ELSE
LEDG := TRUE;
temp := temp_volt / 10.00;
humi := humi_volt / 10.00;
IF temp >= tempthreshold THEN
LED1 := TRUE;
ELSE
LED1 := FALSE;
IF humi >= humithreshold THEN
LED2 := TRUE;
ELSE
LED2 := FALSE;
END_IF;
Picture as follow as :
