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5 Switching, Auxiliary and Miscellaneous Functions 01.93

5.7 G171 Fill FIFO buffer (fom SINUMERIK 880 GA2)

5.7 G171 Fill FIFO buffer

(from SINUMERIK 880 GA2)

The function "Fill FIFO buffer" is an option. The order

code is Bxx

Block change times can be reduced if a FIFO buffer is used. It only makes sense to use the

function "Fill FIFO buffer" in AUTOMATIC mode. The function is called with G171. It is non

modal. You can program G171 in the same block as movements and auxiliary functions.

G171 stops execution of the part program and fills the FIFO buffer.

Execution remains stopped:

• until the FIFO buffer is full

• until a block with M02 or M30

• until a block with @714

• until a setting data block

To assign the FIFO buffer to a channel set a machine data (MD). If only one FIFO buffer is

assigned to one channel on an NC CPU, the channel can use the full buffer depth of 60

blocks. If the part program is > 60 NC blocks deep, G171 must be reprogrammed.

If two FIFO channels are selected on an NC CPU, these FIFO channels share the buffer

capacity, i.e. 30 NC blocks each. Only up to 2 FIFO channels per NC CPU can be defined.

On a RESET, the FIFO buffer is emptied.

5–6

SINUMERIK 880, (PG)

Siemens SINUMERIK 880 GA2 Programming Guide

Other manuals for Siemens SINUMERIK 880 GA2