NCINPUT

NCNPUT represents the normally-closed input device in LADDER symbology. This component may represent a physical input of PLC or a logical input to associate with a  RELAY device. To establish if an input is physical or logical opportune values must be programmed on the REFERENCE parameter of the property dialog. If the REFERENCE value refers to a physical resource of the PLC then a physical input will be created. If the REFERENCE field does not refer to any physical resources then the EINPUT will be configured as logical input to associate with a RELAY device. This configuration is also called LOGICAL LINKS .

There is no limit on the NCINPUT devices that can be relationed with a RELAY device.

See also : EINPUT, INPUT, ENCINPUT, OUTPUT, EOUTPUT, RELAY