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REV.-A
<
Fully Energized Acceleration or Speed Reduction>
A "full-energizing" circuit in the DCU enables the forced energizing of the DC motor for a given interval.
PRC control does not occur in the absence of an encoder signal; therefore, this energizing circuit is
used to allow acceleration of the motor, from the stopped condition, under PRC control. The circuit,
when ON, causes forced energizing. The activation of the circuit is enabled by a command written into
the gate array.
For speed reduction modes under both PLL and PRC control, activation of the full energizing circuit
enhances the features of the motor's negative-going edges, causing forced energizing that is in
opposition to the motor. This allows for rapid braking.
ON
Motor ON/OFF Signal OFF - - - - '
Dynamic Drive
Encoder A Phase
ON
Dynamic Drive Signal OFF----
PRC Control Signal
Figure 2-52. Acceleration by Full Energizing
2-48
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