HEIDENHAIN iTNC 530 Service Manual page 56

Error
The message RELAY
EXTERNAL DC VOLTAGE
MISSING does not disappear,
although the key CONTROL
VOLTAGE ON is pressed.
When the machine is
switched on, the error
message "EMERGENCY STOP
defective"
iTNC monitor is "frozen".
The control has locked up.
The main switch has to be
switched off and on again.
After reset of the control
"Power fail Interrupt!" is
entered in the log of new
software versions.
During switch-on or
operation DSP errors are
generated. A mechanical
reason or a defective unit
can be ruled out.
There are repeated hard disk
errors.
NC functions do not function
any more. (The control may
have reported that the
corresponding files have
been deleted.)
Error messages regarding
encoders or other
connected units are
generated although you find
out that these do not cause
the errors!
Various error messages are
generated which, however,
are not substantive.
The machine cannot be
referenced after switch-on,
or during operation neither
the axes can be moved nor
the spindle switched on.
5 – 56
Possible cause of error
EMERGENCY STOP chain
interrupted
24 V power supply
(connector) X34 missing
MC defective
Wiring defective,
contactors defective or
too slow
MC defective
Power failure
Failure of one or several
phases in the supply line
Supply voltage fallen
below minimum
Interruption in the
electrical cabinet
Inverter (power supply
module) defective
Short circuit of drives
(drive modules, motors)
Data loss on the hard disk
in the range of the SYS
partition
Defects on the hard disk
Defective unit connected
to the control (short
circuit, etc.)
Data loss on the hard disk
in the range of the SYS
partition
Defective unit connected
to the control (short
circuit, etc.)
Probe or handwheel that
were exposed to humidity
(coolant, etc.) or have
been damaged --> Supply
voltages (5V, 12V, 15V)
are impaired. A variety of
error messages are
possible.
Connection (short circuit)
of shielding potential
(chassis, cable shielding)
with 0V voltage potential
of the NC power supply.
Interruption between NC
Stop key and control (the
NC Stop signal is low-
active).
Measures for error
diagnosis and/or
corrective action
Check output "Control is
ready" and
acknowledgment I3
Check the related
components
Check the primary supply
(cables, fuses, terminals)
Check the wiring of the
inverter system, see
circuit diagrams of the
machine manufacturer.
Check the function of the
inverter system or the
motors.
Check the hard disk.
Activate the NC software
again.
Check the hard disk.
Disconnect suspicious
units.
Check the hard disk.
Activate the NC software
again.
Disconnect defective or
suspicious units or cables.
Check the cables for
damage. Check the
machine for correct
shielding (ask the machine
manufacturer).
Eliminate the interruption,
repair the key element,
etc.
HEIDENHAIN Service Manual iTNC 530
Descriptions in this
manual
See "Checking the
Enables on the iTNC 530"
on page 16 – 229.
See "Error message:
EMERGENCY STOP
defective" on page 16 –
236.
See "Power Supply" on
page 17 – 251.
See "Service Manual for
Inverter Systems and
Motors".
See "Test of Hard Disk"
on page 12 – 153.
See "Reloading the NC
Software Used" on page
14 – 209.
See "Test of Hard Disk"
on page 12 – 153.
See "Notes and Tips" on
page 6 – 72.
See "Test of Hard Disk"
on page 12 – 153.
See "Reloading the NC
Software Used" on page
14 – 209.
See "Error Localization by
Process of Exclusion" on
page 6 – 66.
See "Notes and Tips" on
page 6 – 72.
See "Machine Operating
Panel" on page 23 – 389.