进先出(FIFO)读功能模块(FIFO_ RD)从表中移出数据。数值总是从表的底部移出。如果指针指向最后位值，表就满了。FIFO_RD必须用来删除指针入口存储单元的记录并且指针减1。IFO_ RD和FIFO_ _WRT结合使用，FIFO_ WRT使指针增1并且把指针存储单元的内容写入表中。
BENTLY NEVADA 3300-16-02-01-0?1-01-01-00 USPP 3300160201
GE FANUC IC3600SOTJ1 USPP IC3600SOTJ1
OMRON 3F88M-116A USPP 3F88M116A
ASEA BROWN BOVERI 503349 NSFP 503349
MODICON AS-C484-255 USPP ASC484255
ALLEN BRADLEY 1770-FL NSFP 1770FL
GIDDINGS & LEWIS 502-02723-52 USPP 5020272352
GE FANUC IC800STI105D2 USPP IC800STI105D2
SIEMENS 6ES5-460-7LA13 NSFP 6ES54607LA13
SYMAX 8010-SFI-610 USPP 8010SFI610
PINNACLE SYSTEMS INC MGK-24-OF-AU USPP MGK24OFAU
POWERTEC INDUSTRIAL MOTORS INC C0031.N4N1025 USPP C0031
CUTLER HAMMER FDPW367T USPP FDPW367T
OMRON C2000H-CPU01 USPP C2000HCPU01
INDUSTRIAL SCIENTIFIC 7810-1730 NSPP 78101730
MEASUREX 09637701 USPP 09637701
GETTYS PS15B-200 NSFP PS15B200
