To use 1/2-slot addressing the rack backplane switches must be set...
Sw-1 could be on or off, controls output state on hardware failure
Sw-2 OFF
Sw-3 OFF
Sw-4 ON
Sw-5 OFF
Sw-6 could be on or off, controls EEPROM transfer
Sw-7 could be on or off, controls EEPROM transfer
Sw-8 could be on or off, but most likely OFF
Try re-seating the switches by turning them all opposite and back again.
Remember DO NOT pull the PLC out of the rack with the power on !!!
Sw-1 could be on or off, controls output state on hardware failure
Sw-2 OFF
Sw-3 OFF
Sw-4 ON
Sw-5 OFF
Sw-6 could be on or off, controls EEPROM transfer
Sw-7 could be on or off, controls EEPROM transfer
Sw-8 could be on or off, but most likely OFF
Try re-seating the switches by turning them all opposite and back again.
Remember DO NOT pull the PLC out of the rack with the power on !!!
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