Edition from 23.11.2017
13
PLD880. Stepper motor driver
www.purelogic.ru8 (800) 555 63 74
08. Protection functions, settings
POWER OFF DEVICE BEFORE MAKING ANY SWITCH-OVERS.
Polarity reversal power protection - driver will not be switched on.
Protection against wrong stepper motor coil connection and coils linked
together / ‘+’ power supply.
In some cases by interturn short-circuit of stepper motor coil, short-
circuit protection may not work because there is no exceeding of
permissible alarm current. This happens because under such coil
short circuit resistance does not equal 0 and the driver maintains the
specified current.
Protection against voltage jumps – protection function operates when
there is more than 90V, protection against back EMF effect.
Inbuilt dumper - back EMF compensation device from stepper motor.
Softstarter - As power voltage or ENABLE signal is turned on, current
in stepper motor coils increases gradually.
Phase current adjustment - vibrations exclusion at low revs.
Automatic compensator of midfrequency stepper motor resonance —
electronic scheme which allows to remove midfrequency resonance
effect which appears in this range: 6-12 cycles per second.
When the power is supplied, green LED POWER, green LED STEP/ENB
and red LED ERROR flash on.
When there is no alarm red ERR LED goes out in 1 sec and the
green ones are still switched on (if ENABLE=1, green LED goes out;
ENABLE=0, green LED is on or blinks when there is STEP frequency).
When the protection function operates, the driver switches off stepper
motor coils, red signal ERR flashes on, green STEP/ENB LED goes out
and opto-coupler of error closes/opens.
Collector (С) and emitter (Е) of opto-coupler error are terminated to
DB-9M type connector according to fig.1. Switch SW9 (Function) inverts
opening/closing of opto-coupler error.
The driver restores its work after alarm cause removal and switching
off/on power supply.
Protection functions, setup
09
Fig. 5. Stepper motor driver connection scheme
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