Hi, I'am a newbie in barcode reader.I was told to set up two barcode readers. Reader1 reads the data, reader2 reads the data,PLC compares the data, if both have the same data, an output will turn on. I'm planning to setup like this. I will use a CJ1M cpu with a SCU21 unit. Connect the two barcode reader via RS232C of SCU21.Is this the correct way to setup this, or you have any other much better way to do this. thanks