Since this sensor has PWM outputs, you can connect it to one of the PLC's pulse measurement inputs. On the F2424 this can be any of the input #1 to #6.
You can then enable the pulse measurement using the PMON statement. Thereafter, you can simply read the pulsewidth of the incoming pulse using the PULSEWIDTH() function. The period of the incoming pulse is read using the PULSEPERIOD() function. The duty cycle is the ratio of the pulsewidth/pulseperiod. You can then convert the reading to temperature.