324 Programming: Q Parameters
9.8 Additional Functions
FN 20: WAIT FOR: NC and PLC synchronization
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 block is fulfilled. The TNC can
check the following PLC operands:
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
In an FN20 block you can define a condition with a
maximum length of 128 characters.
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