HEIDENHAIN TNC 426, TNC 430 379
10.8 Additional Functions
Example: Assign the value of the active scaling factor for the Z
axis to Q25.
FN19: PLC: Transferring values to the PLC
The function FN 19: PLC transfers up to two numerical values or Q
parameters to the PLC.
Increments and units: 0.1 µm or 0.0001°
Example: Transfer the numerical value 10 (which means 1 µm or
0.001°) to the PLC
FN20: WAIT FOR NC and PLC synchronization
With function FN 20: WAIT FOR you can synchronize the NC and PLC
with each other during a program run. The NC stops machining until
the condition that you have programmed in the FN 20 block is fulfilled.
With FN10 the TNC can check the following operands:
55 FN18: SYSREAD Q25 = ID210 NR4 IDX3
56 FN19: PLC=+10/+Q3
This function may only be used with the permission of
your machine tool builder.
PLC Operand Abbreviation Address range
Marker M 0 to 4999
Input I 0 to 31, 128 to 152
64 to 126 (first PL 401 B)
192 to 254 (second
PL 401 B)
Output O 0 to 30
32 to 62 (first PL 401 B)
64 to 94 (second PL 401 B)
Counter C 48 to 79
Timer T 0 to 95
Byte B 0 to 4095
Word W 0 to 2047
Double word D 2048 to 4095
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