Monitoring Of The Power Supply Unit - HEIDENHAIN iTNC 530 Service Manual

3.3.6 Monitoring of the power supply unit

The rectified supply voltage of the power supply unit is monitored. The supply voltage must lie
within a defined range (400 V ± 10%). If this is not the case the power supply unit reports an AC
fail (PF.PS.AC).
At the same time, the dc-link voltage is monitored.
If approx. 760 V- (UV 120, UV 140, UV 150, UR 2xx: approx. 800 V) is exceeded, the NC revokes
Excessive voltage
the pulse release (reset) for the IGBT (end stage) of the power stage. The motors run out non-
controlled. No energy is returned to the dc link.
The list does not claim to be complete; ask your machine tool builder!
Possible
You may add your own experiences!
causes of error
Too low
voltages
The UV 105 power supply unit reports a powerfail if the dc-link voltage
is < approx. 385 V and the supply voltage is < approx. 330 V.
Inverter signal
AC fail (PF.PS.AC)
Powerfail (PF.PS.ZK)
Since the AC fail is reported to the control before the powerfail, the control has more time to
react to the subsequent dc-link voltage failure.
If a power fail is triggered on the control, all drives are brought to a controlled stop. The PLC
-outputs are switched off and the control freezes to ensure that the hard disk can no longer be
accessed.
The control must be turned off and on again.
MP2150
Input:
3 – 672
Defective braking resistor (conversion of electrical energy to heat energy not possible)
Defective infeed/regenerative feedback module (energy recovery not possible)
Interruption in the primary supply (fuses, wires, etc.; energy recovery not possible)
If the dc-link voltage falls below approx. 385 Vdc (UV 120, UV 140, UV 150, UR 2xx: approx.
410 V), the power supply unit reports a powerfail (signal PF.PS.ZK)
If the dc-link voltage falls below approx. 155 Vdc (UV 120, UV 140, UV 150, UR 2xx, UV 105:
approx. 200 V), the control is reset (signal RES.PS).
Below approx. 135 Vac (UV120, UV140, UV150, UR2xx, UV105: approx. 180V), the power
supply unit switches off.
With MP2150, you can define which inverter signal is to trigger powerfail on the control.
Note
Only the regenerative HEIDENHAIN inverters provide the AC-fail signal.
Powerfail signals on the control
0: AC fail
1: Power fail and AC fail
2: Reserved
3: Powerfail
Note
Using module 9167, the machine manufacturer can switch the dc-link voltage monitoring on
or off.
Meaning
Failure of supply voltage for inverter
DC-link voltage failure
HEIDENHAIN Service Manual iTNC 530