Adding Dynapath 2000 to an old Cincinnati Mill

The boss purchased a new Dynapath 2000 cnc/plc to retrofit a old(1960s) Cincinnati mill. Also a used controller cabinet with AEG drives. He tore all the old electronics, hydraulics and lubrication off, built a mechanical counterweight and then hired me to put it all back together with the Dynapath. Everything has gone well to this point. I am working on the PLC program and have hit a roadblock with gear changing. The Dynapath uses a three bit binary code for gear change and the Cinci only has two gear and neutral. We have all the parameters set properly, but I am unsure how to handle the gear change in the PLC. The spindle speed needs to be reduced or increased to 5rpm then the gear change and the spindle speed either to 0 or next speed needed. Our low range is 1 to 300 rpm and high is 300 to 1970 rpm. Any help would be appreciated.