Resolver for Conveyor/Chain/Track

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This element is used to figure out how far a conveyor, a chain or a mangle has transported something or how many material has come out of a continuous generator. In order to do that, the conveyor resp. the chain resp. the generator must be specified as the master of the resolver and a word needs to be defined in the PLC. The resolver counts forward and backward, it just does incremental changes on the PLC word. It means you can change the value in the PLC program at any time, and the resolver will continue counting starting with the new value. You can define the resolution similar to the other position detectors. We have not designated a mechanism of synchronization, because you can influence the reported value in the PLC program.

 

You can only connect this resolver to the above-mentioned elements. If you connect it to a diagonal conveyor, please note that the movement measured is too small by a factor of square root 2 (about 1.4). But you can correct this easily by adapting the resolution.

 

If the generator is connected to a continuous generator it will only get the movement of the track if this one covers its belower left edge.

 

If you do not need a number, but just an indicating input, use the lowest bit. If you need two impulse tracks, which are offset by 90°, use the bit1 for track A and the bit1 XOR Bit0 for track B. for example like this:

A        Bit1

=        TrackA

X        Bit1

X        Bit0

=        TrackB

Of course you have to set the resolution so low that the value changes not more than 1 from cycle to cycle. If necessary you have to adapt the simulation rate or you have to use another pair of related bits with higher bit numbers.

See also:

Spy

Linear mover with sensors

Common properties

Static elements of simulation

 

Tabsheet: Sensors