18 – 278 HEIDENHAIN Service Manual iTNC 530
Assignment of the
position encoders
MP 100 is read from the right to the left and contains the information which axis is the first, the
second, the third axis, etc.
EnDat encoders It is possible to connect EnDat encoders to all position encoder inputs of an MC or CC!
Memory areas in
the EnDat
encoder
EnDat encoders offer the possibility of storing machine or system-dependent data in the
memory area reserved for the machine tool builder.
Signal type and
input frequency
For other signal types (TTL, etc.) adapters can be used.
--> See “Position encoders” on page 27 – 520.
Polyfuses
MP 100 must not be changed!
Assignment of speed encoder inputs
in the machine parameters
Axes Spindles
Machine parameters MP 110.x MP 111.x
Assignment of the position encoder inputs to the
drive-control boards of the CC 424 (B)
Position encoder inputs
1 (main DCB) X201 - X206
2 (auxiliary DCB) X207 - X214
On the CC 424 (B) with 8 and with 14 control loops, X207 and X208 are still located on the
main DCB.
MC 420 and MC 422 (B/C) CC 424 (B)
Connector X1 - X6, X35 - X38 X201 - X214
Signal type and
associated MP
1 Vpp or 11 µApp 1 Vpp or 11 µApp
MP 115.0 MP 116.0
Input frequency
and associated
MP
With 1 Vpp: 27 kHz or 400 kHz
With 11 µApp: 27 kHz or 140 kHz
With 1 Vpp: 27 kHz or 400 kHz
With 11 µApp: 27 kHz or 140 kHz
MP 115.2 MP 116.2
Current MCs and CCs feature so-called "Polyfuses". These are electronic fuses that
separate defective peripheral devices from the low voltages in the control in the event of an
error. This is also true for the encoders!
If a defective encoder draws too much current, it is "separated" from the control component.
Corresponding error messages are displayed.
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