HEIDENHAIN iTNC 530 HSCI - Examination; Control Is Ready Output and Input (EMERGENCY STOP Chain)

17 – 228 HEIDENHAIN Service Manual iTNC 530 HSCI
17.2 Examination
The iTNC 530 HSCI features comprehensive diagnosis tools, such as DriveDiag, HSCI bus diagnosis,
PLC-TRACE or PLC-TABLE.
These diagnosis tools are suitable for checking the enables on the iTNC 530 HSCI .
Moreover, the service engineer requires measuring equipment, such as a multimeter, etc.
17.2.1 "Control is ready" output and input (EMERGENCY STOP chain)
Error:
Message "Relay
external DC voltage
missing"
continuously
displayed
If the message Relay external DC voltage missing does not disappear after you press the
CONTROL ON key, carry out fault diagnosis as follows:
No
Yes
Is the
EMERGENCY
STOP chain (emergency stop button,
axis limit switches, etc.)
interrupted?
Start up the machine as far as possible.
Are +24V
available at the terminals
(UEC 11x: X5/9a,10a
or PLB 62xx: X9/7a,7b)?
Yes
No
Remove the interruption.
There is still an interruption that needs to
be eliminated. (Use the circuit diagram of
the machine.)
Are the
acknowledgments correct
(value at the terminals = 1)?
Look up in the HSCI bus diagnosis whether
the two Control is ready inputs are set
(UEC 11x: X5/9a,10a or PLB 62xx: X9/7a,7b).
No
Yes
The PLC does not recognize the high level.
It is likely that the Control is ready inputs
on the UEC 11x or PLB 62xx are defective.
--> Replace the device!
The control registers the acknowledgments.
The message Relay ext. DC voltage missing
should disappear.
If it does not, contact your machine tool
builder or a HEIDENHAIN service agency!
Yes
No
Find the cause and correct the error.
(Use the circuit diagram of the machine.)
Are +24 V available at
the Control is ready output
(UEC 11x: X6/12a or
PLB 62xx: X9/3a)?
Is the supply for the
Control is ready output
(UEC 11x: X4/1a or PLB 62xx: X9/1a)
available?
Yes
No
It is likely that the Control is ready output
on the UEC 11x or PLB 62xx is defective.
--> Replace the device!
Examination of "Control is ready"