The interrupt is activate only once when enter or leave the range. So, your output will be On only one plc scan. I suggest to only use a A270 in the program and compare with range. The A270 is a DINT so compare with long range fonction.
For the last few years now, we use Omron NX remote IO. With these price per Analog Input/Output drop a lot compare to PLC Rack card. You can use Omron PLC or you can use your PLC brand with Ethernet/IP communication.