Logical links

The LOGICAL LINKS are particular connections which can be done between RELAY, OUTPUT, EOUTPUT components and INPUT, EINPUT, NCINPUT and ENCINPUT devices. For convention we will call the components RELAY, OUTPUT and EOUTPUT the output devices.

A LOGICAL LINKS is done assigning to an INPUT device the same REFERENCE code of an output device. In this way we tell  the system to treat the output and the input as an unique object. The value assumed by the output device will be assumed also for all the input devices linked with.  With the LOGICAL LINKS method it is possible to drive several sections in the net starting just from a master signal. In the example below we connected two inputs on a RELAY. The first input activates the RELAY and the second input, linked with the same RELAY, will sustain the RELAY activation. In the same way another input is logical linked to the RELAY so a generic output can be driven starting from the same signal. There's no limit on the number of the input that you can associate to an output device. In the LadderDIP PLC Studio software the LOGICAL LINKS are showed as a dashed line. This dashed line joint the components. The displaying of the LOGICAL LINKS is configurable by software.