HEIDENHAIN TNC 320 User Manual page 347

FN 19: PLC – Transfer values to the PLC
This function may only be used with the permission
of your machine tool builder.
The FN 19: PLC function transfers up to two numerical values or Q
parameters to the PLC.
FN 20: WAIT FOR – NC and PLC synchronization
This function may only be used with the permission
of your machine tool builder.
With the FN 20: WAIT FOR function you can synchronize the NC
and PLC during a program run. The NC stops machining until the
condition that you have programmed in the FN 20: WAIT FOR block
is fulfilled.
SYNC is used whenever you read, for example, system data via
FN18: SYSREAD that require synchronization with real time. The
TNC stops the look-ahead calculation and executes the subsequent
NC block only when the NC program has actually reached that
block.
Example: Pause internal look-ahead calculation, read current
position in the X axis
32 FN 20: WAIT FOR SYNC
33 FN 18: SYSREAD Q1 = ID270 NR1 IDX1
HEIDENHAIN | TNC 320 | Conversational Programming User's Manual | 9/2016
Additional functions
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