代PLC不仅有逻辑运算、计时、计数、顺序控制等功能，还具有数字和模拟量的输入输出、功率驱动、通信、人机对话、自检、记录显示等功能。既可控制一台生产机械、一条生产线，又可控制一个生产过程
目前，大多数PLC仍采用继电控制形式的“梯形图编程方式”。既继承了传统控制线路的清晰直观，又考虑到大多数工厂企业电气技术人员的读图习惯及编程水平，所以非常容易接受和掌握。梯形图语言的编程元件的符号和表达方式与继电器控制电路原理图相当接近。通过阅读PLC的用户手册或短期培训，电气技术人员和技术工很快就能学会用梯形图编制控制程序。同时还提供了功能图、语句表等编程语言
INDRAMAT DIGITAL CONTROLLER DDS02.2-W050-B
SIEMENS SIMATIC S5 6ES5095-8MB02
YASKAWA ELECTRIC SERVO DRIVE CACR -IR 44SFB P00 B12
BOSCH SERVO MOTOR SD-B3.068.030-04 000
FANUC DRIVE A06B-6079-H102
EUROTHERM DRIVE 590s
FANUC AC SERVO MOTOR A06B-0533-B231
EXLAR LINEAR SERVO ACTUATOR GSFF-EM1-M6-XT
SIEMENS BRUSHLESS SERVO MOTOR 1FT6082-8AH71-4AG1
SIEMENS SERVO MOTOR 1FK7042-5AK71-1TH0
ALLEN BRADLEY PANELVIEW 6185-CACABBR SER A
FUJI ELECTRIC DRIVE FRN 11UC5-2
SIEMENS SERVO MOTOR 1FK7040-5AK71-1EA0
INDRAMAT SERVOMOTOR MAC071B-0-FS-4-C/095-B-1/WI574LV
FANUC AC SERVO MOTOR A06B-0142-B676
FANUC CONTROLLER CARD A20B A20BF
SIEMENS SERVO MOTOR 1FK7040-5AK71-1TG2
KAWASAKI SERVO MOTOR 68BM122HBX22
SIEMENS SERVO MOTOR 1FT6044-1AF71-1AG1
BALDOR SERVOMOTOR EM7081T (40/50 HP RPM)
CONTROL TECHNIQUES UNIDRIVE UNI1404
ALLEN BRADLEY ANALOG INPUT MODULE 1771-IFE C
SIEMENS SERVO MOTOR 1FK7063-5AH71-1TG5
MAGNETEK GPD 315 DRIVE MVA011
BALDOR SERVOMOTOR EM7064T-I (50/40 HP RPM)
OMRON LCD DISPLAY PANEL NT2S-SF122B-EV1
YASKAWA ELECTRIC CARD JANCD-MSP02
SIEMENS PERMANENT MAGNET MOTOR 1FT5102-0AC01-0-Z
SIEMENS SERVO MOTOR 1FT6044-1AF71-2EH1
STOBER GEARBOX P521SPR0030MTL
APEX DYNAMICS INC. GEARBOX AB115-S2-P2
MARATHON ELECTRIC MOTOR 7V A56T34F5302F
INDRAMAT PERMANENT MAGNET MOTOR MDD115B-N-011-N2M-180GB2
ALLEN BRADLEY AC DRIVE 1336S-C007-AA-EN4
ALLEN BRADLEY REMOTE I/O SCANNER MODULE 1747-SN SER B
ALLEN BRADLEY AC SERVO CONTROLLER 1394C-AM07 SER C
ALLEN BRADLEY POWER FLEX 70 20A D 3P4 A 3 AYNNNC0
SIEMENS TEACH PENDANT A
ALLEN BRADLEY COMPACT LOGIX 1769-L32E
EUROTHERM DRIVES 955-8R0030
INDRAMAT SERVO MOTOR MAC90C-0-GD-4C/110-A-0/W1520/S01