GE PACSystems RX7i - Page 196

Chapter 4. Ladder Diagram (LD) Programming
GFK-2950C February 2018 181
Example for FIFO Write
PRODUCT is a FIFO table with 100 word-sized elements. When the
enabling input UNPACK is ON, a data item from P_CODE is copied
to the table location pointed to by the value in STK_PTR. Output
node FL passes power when PTR = LEN, firing the FULL coil. No
further data from P_CODE can be added to the table without first
copying data out, using the FIFO_RD function.