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

9.3.6 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:
Motors run out If approx. 760 V- (UV 120, UV 140, UV 150, UR 2xx: approx. 800 V) is exceeded, the NC revokes
non-controlled 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.
Possible No claim for completeness; contact your machine manufacturer!
causes of error If possible, write your own experience!
Power fail
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) Dc-link voltage failure
Since the AC fail is reported to the control before the power fail, 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 has to be switched off and on again.
MP2150
Input:
Possible No claim for completeness; contact your machine manufacturer!
causes of error If possible, write your own experience!
9 – 64
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)
Below approx.. 385 V– (UV 120, UV 140, UV 150. UR 2xx: approx. 410 V), the power supply
unit reports a powerfail (signal PF.PS.ZK).
Below approx. 155 V– (UV 120, UV 140, UV 150, UR 2xx, UV 105: approx. 200 V), there is a
reset of the control (signal RES.PS).
Below approx. 135 V– (UV 120, UV 140, UV 150, UR 2xx, UV 105: approx. 180 V), the power
supply unit switches off.
With MP2150, you can define which inverter signal is to trigger powerfail on the control.
Meaning
Failure of supply voltage for inverter
Note
Only regenerative HEIDENHAIN power supply units provide the AC-fail signal.
Powerfail signal on the control
0: AC-fail
1: Power fail and AC-fail
2: reserved
3: Powerfail
Power failure
Failure of one or several phases in the supply line.
The power supply voltage has fallen below the minimum value.
Interruption in the electrical cabinet.
Inverter (power supply module) defective
Short circuit of drives (drive modules, motors)
HEIDENHAIN Service Manual iTNC 530