控制器分组合逻辑控制器和微程序控制器，两种控制器各有长处和短处。组合逻辑控制器设计
麻烦，结构复杂，一旦设计完成，就不能再修改或扩充，但它的速度快。微程序控制器设计方便，结构简单，修改或扩充都方便，修改一条机器指令的功能，只需重编所对应的微程序；
要增加一条机器指令，只需在控制存储器中增加一段微程序，但是，它是通过执行一段微程序。
具体对比如下：组合逻辑控制器又称硬布线控制器，由逻辑电路构成，完全靠硬件来实现指令的功能。
ANDERSON INSTRUMENT SR090G058G2100 PRESSURE TRANSMITTER PSIG X10 0/5000PSIG
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7130371, 1151-0011-0042 SENSOR MODULE 1151-0011-0142
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POLYSONICS MASTER SERIES MST-P ULTRASONIC DIGITAL FLOWMETER 24VDC MSTP
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01151-0934-0204 TRANSMITTER
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ALLEN BRADLEY 1770-SB DATA CARTRIDGE RECORDER 230-0000-02 115V 50/60HZ
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FOXBORO 823DP-D3S1NM2 PRESSURE TRANSMITTER REF. NO. 90F50817-8A1 ORIGIN. 2A9106
FANCHER & ASSOCIATES R24R-17BH-18-FT
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OMEGA RD1616 CHART RECORDER SOURCE 85-300 VAC MFD 9311 SERIAL: N3K8007T
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ABB TB557F2EB1F04 INSERTION PH/ORP SENSOR 100PSI
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DIGITAL EQUIPMENT DEC POWER SUPPLY H7876-AA , REV B01
HOLADAY INDUSTRIES HI-1500-3B
ETS-LINDREN HOLADAY H-410137
HORTON NIRECO TM130 TENSION
ROSEMOUNT 823DP-I3S1NL2 TRANSMITTER W/ B0139FY E M/821AL,823,827 LOW RNG: 4-20mA
B0138NS SENSOR MODULE ORIGIN: 2A9038 MAT'L: C0-NI
IBG EDDYLINER 11086 PRUFCOMPUTER GMBH 12086 TESTBOX 90-260V 47-440HZ
HONEYWELL STD930 PRESSURE TRANSDUCER 0-30PSI, STD930-A1A-00000-F1D3-3138
ROSEMOUNT 1151 SMART TRANSMITTER 1151GP5S22B1L4
HONEYWELL ST3000 S900 R300 PRESSURE
YSTR94G-11A-4A0/YYYYYYYYY/-1C,MB,TC,ZS-B67M
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BAILEY BC12611350 DIFF PRESSURE TRANSMITTER 6"H2O W/ 25710006IWG TRANSDUCER 9/39
LOAD CONTROLS PH-3A-HG POWER CELL 460V 4.2A 4-20mA MCP20733
VIATRAN 3505AMSHB PRESSURE TRANSMITTER 0-100PSI 2" CONN. 3505AM6HBA20
ROSEMOUNT 1055-01-10-22 SW VER# 3.30 ANALYZER SOLUCOMP II 115/230VAC
ALNOR APM360 MULTI-PURPOSE METER W/ MODEL: 275
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