Appendix
– Timing Diagram
21
Timing Diagram
a: Every time the drive powers up after being powered down or after the drive has seen an
encoder related fault, the drive will perform a HF Injection before the first run to locate the
motor magnets. When it does this, a humming noise will come out of the motor. The drive
takes approximately 0.30s to perform the HF Inject before running.
NOTE: the brakes should NOT be opened while the drive is performing this initial magnet
search after power up or an encoder fault.
DRIVE ENABLE
(logic input)
RUN or RUN UP or RUN DOWN
(logic input)
Mechanical Brake
Speed Regulator Release
(logic output)
Motor Contactor
Speed Command
UP/DWN & S-CURVE SEL
(logic inputs)
Speed Reference
a
READY TO RUN
(logic output)
RUN COMMANDED
(logic output)
FAULT
(logic output)
HF Injection
