The REFERENCE Code

The REFERENCE is a particular code that can identify an object inside the schematic. The REFERENCE must be supplied for all the I/O blocks and memory access blocks like INPUT , EINPUT , NCINPUT , ENCINPUT , OUTPUT and EOUTPUT. In fact, this device must know where to put/get the signal to be treated. The REFERENCE field must be configured through the property dialog associated with the component. For the mentioned items, the system gives the possibilty to select one of the available PLC resources.  For all the other components the REFERENCE is optional and the software automatically assigns a unique reference code for all the components in the schematic .  The REFERENCE code gives the possibility to obtain particular configurations called LOGICAL LINKS .

See also :  INPUT , EINPUT , NCINPUT , ENCINPUT , OUTPUT , EOUTPUT , LOGICAL LINKS , RELAY .