NORDAC ON / ON+ (SK 3xxP) – Manual with installation instructions
42 BU 0800 en-4521
The counting direction of the incremental encoder must correspond to the direction of rotation of the
motor. If the two directions are not identical, the connections of the encoder tracks (Track A and Track
B) must be switched. Alternatively, the resolution (pulse number) of the encoder in P301 can be set
with a negative prefix.
Alternatively, the motor phase sequence can be changed via parameter P583
direction of rotation can be changed using the software only.
Incremental encoder
According to the resolution (pulse number), incremental encoders generate a defined number of
pulses for each rotation of the encoder shaft (Track A / Track A inverse) With this, the precise speed
of the encoder or motor can be measured by the frequency inverter. By the use of a second track (B /
B inverse) shifted by 90° (¼ period), the direction of rotation can also be determined.
The supply voltage for the encoder is 10 … 30 V. An external source or the internal voltage can be
used as the voltage source.
TTL encoder
Special terminals are available for connection of a rotary encoder with TTL signals. Parameterisation
of the corresponding functions is made with the parameters from the “Speed control” group (P300 et
seq.).
HTL encoder
The digital inputs DIN3 and DIN4 are used to connect an encoder with an HTL signal.
Parameterisation of the corresponding functions is performed with parameters P420 [-03/-04].
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