I have not installed resistor at start and finish end of the multidrop configuration. Is it possible that error '08 30H' (Check if transmission line is interrupted) is generated due to mismatch of signal transmission in absence of resistor?
I had placed order for resistance of 330 ohm (as found in the manual). Is this rating ok?
I have not used FB7, FB8 before for Modbus send and receive fucntions. Are they ok/reliable for data read/wirte in CPU414-4H redundant system?