Amx NetLinx Custom Panel Interface NXP-CPI16 Manual do Utilizador descarregar pdf (Página 8)

NXP-CPI16 NetLinx Custom Panel Interface

Quadrature Inputs

By default, the quadrature inputs expect the phase relationship, shown in FIG. 2, for a clockwise rotation

of the encoder to generate a positive level change. If the phase relationship does not match the example,

a clockwise rotation will generate a negative level change. This can be corrected in two ways:

 Inputs A and B can be wired in reverse so the phase relationship is obtained at the quadrature

encoder input pins.

 Insert a QDIR Send_Command in the NetLinx program.

FIG. 2 Quadrature inputs phase relationship for clockwise rotation

200 nsec minimum

Input A

Input B

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 17 18

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Amx NetLinx Custom Panel Interface NXP-CPI16 Manual do Utilizador Página 8