Fagor DDS Series, Hardware Manual

Page: 92 / 406

   Power supplies
2.
94
Ref.1912
DDS
HARDWARE
· 92 ·
1. For
RPS power supplies
Apply power to the auxiliary power supply and close the main internal
contactor - short-circuit NS1 and NS2 (pins 3 and 4) of connector X3 -.
2. The power supply checks the system status
If the status is correct
The
System OK contact closes (pins 6 and 7 of X6) and it stays closed
while the control circuits are powered and no error comes up in any of the
modules of the system.
The red «FAULT» indicator light blinks (it is not indicating an error
because there are no phases yet).
If the status is not correct
The red «FAULT» indicator light is permanently on (not blinking).
3. Apply power to the main power supply
Power is applied from mains through the power connector (1) on top of
the power supply (L1, L2, L3). The red «FAULT» indicator light will turn
off and the smooth start-up will begin.
4. The green DC BUS ON light on
Having line voltage and being the PWM Enable signal (pin 4 of connector
X6) active, after 4 seconds, the green DC BUS ON indicator light turns
on (fixed in RPS mode, blinking in RB6 mode)
meaning that the power
DC BUS has the proper dc voltage.
If for any reason an error is activated at the power supply or at any drive it
supplies to, the system will act as follows:
1. The green indicator light DC BUS ON will turn off indicating that the power
supply will stop supplying voltage to the power DC BUS.
2. The red FAULT light will be on permanently.
With the Error Reset input (pin 1 of X6), it is possible to eliminate the errors
at the drives that are part of the system
- see chapter 14, section “resettable
errors”, of the “man_dds_soft.pdf” manual - and it acts as follows:
 Its state will be 0 V DC. Activating it with 24 V DC erases all the errors
stored in the memory of each drive of the system.

Should the cause of the error persist, the corresponding module will
show the same error again and it will be necessary to turn the unit back
on to eliminate the error if it is a serious error.
The System Speed Enable input (pin 5 of X6) is related to the Speed
Enable inputs of the drives.
 The state of the System Speed Enable is usually 24 V DC.
 If the System Speed Enable pin is set to 0 V DC, all the drives joined
together by the same internal bus will brake the motors that they control
with the torque corresponding to the active acceleration ramp and when
stopped or when reaching the time limit to stop (programmable with
parameter GP3, see chapter
13 of the “man_dds_soft.pdf” manual), it
cancels the motor torque.
The consumption of each input is between 4.5 and 7 mA.
NOTE . If the PWM Enable (pin 4 of connector X6) is not active, the
display will show the warning A004 and the power DC BUS of the
RPS will not start charging.
DANGER. When the DC BUS ON led turns off it may take about 4 minutes
for the DC BUS to discharge to a safe value (< 60 V DC) depending on the
number of drives that are connected.
NOTE . Remember that if the RPS power supply is running, there is line
voltage and the PWM Enable signal is active. When canceling the PWM
Enable signal the display shows the warning A004, turns on the FAULT
LED and the power supply stops boosting or rectifying the voltage
causing a voltage drop with a value of

2xVline at the power DC BUS.
The drives connected to the power supply will interpret that the power
supply is not ok.