函数块是用户定义的具有参数和临时数据的逻辑块。用户可以定义自己的函数块，而不必局限于PAC系统指令设定的标准函数块。很多情况下，这个特性的使用可以使整个程序的变小。–旦定义了函数块，可以生成很多个程序块实例。每个实例有自己唯–的函数块实例数据，这个事例中包含除含参变量外的所有输入输出参数。
Leukhardt Systems Controller DEASY-DKA 32 #37083
Barber Colman 41AE-25103-214-1-00 Interface #29631
Control Technology Controller 2600XM-10 #32344
Marposs RS232 Card 6321321000 #31517
Marposs Control Board 6321601500 #31518
Allen Bradley Communication Module 1203-SM1 #29120
Square D AC Magnetic Starter 8810-SCO-1 #29105
Fanuc A20B-1000-0970-04A Circuit Board #8117
Fanuc Circuit Board A20B-8100-0450/06B #29158
Westinghouse Breaker MA3800F #29666
Square D Enclosure Panel MH23WP #28785
Allen Bradley 5120-P1 Power Supply #28808
WTC Welding Control Module U60-T92A, S77-V1.4, #22986
WTC Welding Control Module U60-T92A, S77-V2.5, #22988
Ziatech ZT8902 Circuit Board Rev B PCB- 8902-B.2 #7859
Allen Bradley AC Servo Controller 1394-DIM #29203
Barber Colman Interface 80AP-11010-000-0-00 #27044
