SECTION TWO – WIRING AND INSTALLATION
DS2000 USER’S MANUAL (rev.C)
2.35
2.12 DRIVE STARTING SEQUENCE
In order to properly power and enable DS2000 “The Motion Solution” series drives, it is
necessary to follow a start-up sequence, in which the minimum times to fall within are
indicated in order to allow the internal circuits to reach the operating voltage levels and to
make the internal devices ready for enabling.
The chart here below summarizes the start-up sequence and describes the possible reasons
for delays:
• t
1
Time delay required for the following operations:
Switching on of the 24V power supplier and input voltages stabilization
Program loading and logic circuits initialisation
Internal protections check carried out by the internal microprocessor
• t
2
Reset pulse to allow the reading of reference voltages, as well as the internal offsets
initialisation with already stabilized voltages.
• t
3
Time needed by the drive to allow the program start-up after the reset.
• t
4
Charge time of DC BUS capacitors determined by the soft-start circuit and DC BUS
voltage stabilization in order to avoid start-up self induction currents
• t
5
Time for DRIVE OK acquisition by the control
• t
6
Time to allow the Drive to reach the torque and to check the proper operation of power
stages.
The respect of the times indicated in Fig. 2.15 is important to avoid wrong FAULT indications
by the drive.
NOTE: The internal soft-start resistors are sized for a start-up occurring every 60 s. Lower
times cause an excessive stress and can cause the breakdown of such resistors.
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