控制功能包括PID控制運(yùn)算、前饋補(bǔ)償控制運(yùn)算、比值控制運(yùn)算等，應(yīng)根據(jù)控制要求確定。PLC主要用于順序邏輯控制，因此，大多數(shù)場合常采用單回路或多回路控制器解決模擬量的控制，有時也采用專用的智能輸入輸出單元完成所需的控制功能，提高PLC的處理速度和節(jié)省存儲器容量。例如采用PID控制單元、高速計數(shù)器、帶速度補(bǔ)償?shù)哪M單元、ASC碼轉(zhuǎn)換單元等。
(三)通信功能
大中型PLC A16B-2300-0011 系統(tǒng)應(yīng)支持多種現(xiàn)場總線和標(biāo)準(zhǔn)通信協(xié)議（如TCP/IP），需要時應(yīng)能與工廠管理網(wǎng)（TCP/IP）相連接。通信協(xié)議應(yīng)符合ISO/IEEE通信標(biāo)準(zhǔn)，應(yīng)是開放的通信網(wǎng)絡(luò)。
PLC系統(tǒng)的通信接口應(yīng)包括串行和并行通信接口（RS2232C/422A/423/485）、RIO通信口、工業(yè)以太網(wǎng)、常用DCS接口等；大中型PLC通信總線（含接口設(shè)備和電纜）應(yīng)1：1冗余配置，通信總線應(yīng)符合國際標(biāo)準(zhǔn)，通信距離應(yīng)滿足裝置實(shí)際要求。
PLC系統(tǒng)的通信網(wǎng)絡(luò)中，上級的網(wǎng)絡(luò)通信速率應(yīng)大于1Mbps，通信負(fù)荷不大于60%。PLC系統(tǒng)的通信網(wǎng)絡(luò)主要形式有下列幾種形式：1）PC A16B-2300-0011 為主站，多臺同型號PLC為從站，組成簡易PLC網(wǎng)絡(luò)；2）1臺PLC為主站，其他同型號PLC為從站，構(gòu)成主從式PLC網(wǎng)絡(luò)；3）PLC網(wǎng)絡(luò)通過特定網(wǎng)絡(luò)接口連接到大型DCS中作為DCS的子網(wǎng)；4）專用PLC網(wǎng)絡(luò)（各廠商的專用PLC通信網(wǎng)絡(luò)）。
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ALLEN BRADLEY 1745-E151 SER B SLC 150 EXPANSION UNIT
ALLEN BRADLEY 1745-E151 SER B SLC 150 EXPANSION UNIT
ALLEN BRADLEY 1745-E151 SER B SLC 150 EXPANSION UNIT
ALLEN BRADLEY 1745-E151 SER B SLC 150 EXPANSION UNIT
ALLEN BRADLEY 1745-E151 SER B SLC 150 EXPANSION UNIT
ALLEN BRADLEY 1745-E151 SER B SLC 150 EXPANSION UNIT
NIB ALLEN BRADLEY 1745-M1/B MEMORY EPROM MODULE 1745M1
Allen Bradley 1745-R1 Relay Board Processor Unit
ALLEN BRADLEY 1745-E105 USED 1745E105
1745-LP151 1745LP151 NEW NIB SLC150 FS
Allen Bradley Memory Module 1745-M1 1745M1
Allen Bradley H.S. b Module 1745-E155 Used
Allen Bradley (2) New Ribbon Cables 1745-C3
1745-E101 Allen Bradley SLC100 A16B-2300-0011
Allen Bradley 1745-LP153 Processor Unit 1745LP153 New
ALLEN BRADLEY 1745-E151 SER B SLC100 EXPANSION UNIT NIB
ALLEN BRADLEY SLC150 PLC EXPANSION UNIT 1745-E151 SER B
Allen Bradley 1745-E151 SLC Expansion Unit #21209
Allen Bradley 1745-E151 SLC Expansion Unit #21213
Allen Bradley 1745-E151 SLC Expansion Unit #21210
Allen Bradley 1745-E151 SLC Expansion Unit #21214
New in Box 1745-E103/B Allen Bradley 1745-E103 N844
ALLEN BRADLEY 1745-B1 NEW IN THE FACTORY BOX
Allen Bradley 1745-C2 SER B
Allen Bradley 1745-LP101 SER D
ALLEN BRADLEY 1745-M1 NSFP 1745M1
ALLEN BRADLEY 1745-M1 USPP 1745M1
Allen Bradley book Bulletin 1745 SLC Prog
Allen Bradley book Bulletin 1745 SLC Programmable Cont.
ALLEN BRADLEY 1745-LP101 USPP 1745LP101
ALLEN BRADLEY 1745-C3 NSPP 1745C3
ALLEN BRADLEY 1745-C2 USPP 1745C2
ALLEN BRADLEY 1745-C2 NSPP 1745C2
ALLEN BRADLEY 1745-800 USPP 1745800
ALLEN BRADLEY 1745-850 USPP 1745850
ALLEN BRADLEY 1745-R2 NSFP 1745R2
ALLEN BRADLEY 1745-R3 NSFP 1745R3
ALLEN BRADLEY 1745-E101/B SLC 100 EXP. UNIT 1745E101B
ALLEN BRADLEY 1745-E105 NSPP 1745E105
ALLEN BRADLEY 1745-LP154 USPP 1745LP154
ALLEN BRADLEY 1745-E101 USPP 1745E101
Allen Bradley 1745-LP153 SLC 150 Processor Unit
NEW Allen Bradley SLC500 Output Module 1745-OW16
ALLEN BRADLEY 1745-LP101 SLC 100 PROGRAMMABLE CONT
1745-E153 /C Allen Bradley SLC 150 Processor Unit
ALLEN BRADLEY 1745-E151 SER A
ALLEN BRADLEY 1745-E151 SER B
Allen Bradley SLC100 1745 LP101 Programmable Controller
Allen Bradley SLC 150 Processor 1745-LP151 B NEW
ALLEN BRADLEY 1745-C1 PROCESSOR/PROGRAMMER CABLE 1745C1
Allen Bradley Cat # 1745-LP101 Processor Unit
ALLEN BRADLEY SLC 100 PLC, CAT. 1745-LP101,USED
1745-TCAT Allen Bradley SLC 150 1745TCAT N820
Allen Bradley Interface Programing Module # 1745-TCAT
1 NIB ALLEN BRADLEY 1745-M1 1745M1 MEMORY MODULE
ALLEN BRADLEY 1745-LP101 SER D SLC 100 PROG CONTROLLER
ALLEN BRADLEY SLC 100 1745-LP103 PROCESSOR CONTROLLER
Allen Bradley SLC100 PLC 1745-E105
ALLEN BRADLEY 1745-LP101 PROGRAMMABLE CONTROLLER
ALLEN BRADLEY PROCESSOR UNIT 1745-LP1S1
ALLEN BRADLEY PROGRAMMABLE CONTROLLER 1745-E101
Allen Bradley Battery 1745-B1 For SLC-150
Allen Bradley SLC150 PLC 1745-LP156
Allen-Bradley SLC 150 Expansion Unit 1745-E151
Allen-Bradley 1745-E151 SLC 150 A16B-2300-0011 Expansion Unit
1745-LP153 Allen Bradley PLC SLC150 Processor
Allen Bradley Battery 1745-B1 For SLC-100
Allen Bradley #1745-LP101 I/O Module Fixed (U) ABS/9
NEW ALLEN BRADLEY 1745-E105 SERIES C
ALLEN BRADLEY 1745-M1 MEMORY MODULE NEW IN BOX
Allen Bradley SLC150 Expansion Unit 1745-E153 Series A
1745-B1 Battery for ALLEN BRADLEY 1745-LP15 1745-LP152
ALLEN BRADLEY 1745-C1 SER. B CABLE NEW 1745C1
ALLEN BRADLEY EXPANSION MODULE FOR SLC 150~ 1745-E151~
Allen Bradley 1745-PT1 SER A
New in Box 1745-LP153/C Allen Bradley SLC 150 1745LP153
NEW ALLEN BRADLEY 1745-E101 EXPANSION PACK
Allen Bradley 1745-LP151 SER C FRN6
Allen Bradley, 1745-E153 SLC150 Expansion Unit
ALLEN BRADLEY 1745-E157 SLC150 EXPANSION UNIT NEW
Allen Bradley 1745-PCC SER A
ALLEN BRADLEY 1745-LP151 USPP 1745LP151
ALLEN BRADLEY 1745-E104 NSFP 1745E104
ALLEN BRADLEY 1745-LP103 USPP 1745LP103
ALLEN BRADLEY 1745-C1 NSFP 1745C1
ALLEN BRADLEY 1745-B1 NSPP 1745B1
ALLEN BRADLEY 1745-PCC USPP 1745PCC
ALLEN BRADLEY 1745-E153 A16B-2300-0011 NSPP 1745E153
Allen-Bradley 1745-PT1 with cable
ALLEN BRADLEY 1745-E153 SER. A EXPANSION 1745E153 NIB
ALLEN BRADLEY A-B 1745-C3 CABLE 1745C3
Allen Bradley SLC 150 Expansion Unit 1745-E151, Ser A
Allen Bradley 1745-E151 SLC 150 Expansion Unit Ser. A
ALLEN BRADLEY 1745-M1 B MEMORY MODULE
