Schneider PTQ-PDPMV1

1.控制规模

控制规模代表PLC控制能力，看其能对多少输入、输出点及对多少路模拟进行控制。

控制规模与速度有关。因为规模大了，用户程序也长，执行指令的速度不快，势必延长PLC循环的时间，也必然会延长PLC对输入信号的响应。为了避免这个情况，PLC的工作速度就要快。所以，大型PLC的工作速度总是比小的要快。

控制规模还与内存区的大小有关。规模大，用户程序长，要求有更大的用户存储区。同时点数多，系统的存储器输入、输出的信号区（输入输出继电器区或称输入、输出映射区）也大。这个区大，相应地内部器件（解释见后）也要增多，这些都要求有更大的系统存储区。

控制规模还与输入、输出电路数有关。如控制规模为1024点，那就得有1024条I/O电路。这些电路集成于I/O模块中，而每个模块有多少路的I/O点总是有数的。所以，规模大，所使用的模块也多。

控制规模还与PLC指令系统有关。规模大的PLC指令条数多，指令的功能也强，才能应付对点数多的系统进行控制的需要。

控制规模是对PLC其它性能指标起着制约作用的指标；也是PLC划分为微、小、中、大和特大型

2.组成模块

PLC的结构虽有箱体及模块式之分，但从质上看，箱体也是模块，只是它集成了更多的功能。在此，不妨把PLC的模块组成当作所有PLC的结构性能。

这个性能含义是指某型号PLC具有多少种模块，各种模块都有什么规格，并各具什么特点。

一般讲，规模大的PLC，档次高的PLC模块的种类也多，规格也多，反映它的特点的性能指标也高。但模块的功能则单一些。相反，小型PLC、档次低的PLC模块种类也少，规格也少，指标也低。但功能则多样些，以至于集成为箱体。

组成PLC的模块是PLC的硬件基础，只有弄清所选用的PLC都具有那些模块及其特点，才能正确选用模块，去组成一台完整的PLC，以满足控制系统对PLC的要求。

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FARRAND 51 & 1/2" O.A.L. TAPE SPAR LINEAR SCALE 218052-15-1038

TOL-O-MATIC B3W LINEAR BELT DRIVE ACTUATOR WITH MOTOR, NNB

NSK 80" O.A.L. LINEAR BALL SCREW W5016-1987-C5Z 05L5-0005

INA LINEAR BEARING PR 14032 GR3, NIB

54" O.A.L. PRECISION BALL SCREW M-127

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THK CAM FOLLOWER CFH12MA / 350910 A NIB

THREAD CRAFT INC T-4073 COMMERCIAL BACKLASH BALL SCREW 50 OAL 2? DIA NIB

THOMSON ISO 9000 SUPER PILLOW BLOCK BEARING NIB SPB160PN

SAGINAW 31" LENGTH 3" DIAMETER SHAFT BALL SCREW, NO LABEL, SEE PHOTOS

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THREAD CRAFT INC T-6235 COMMERCIAL BACKLASH BALL SCREW 58 OAL 51 TRAV 2? DIA NIB

STAR 83.5" 28-HOLE LINEAR GUIDE RAIL 48-10-1608, RUST

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GEORG FISCHER DOUBLE ACTING ACTUATOR 

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NUMATICCS, LINEAR ACTUATOR SH10606LB16DS3, K13409

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STAR / REXROTH 1807-203-31 LINEAR ROLLER GUIDE RAIL, NNB

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36.562" O.A.L. PRECISION BALL SCREW 80198 / C-160

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THREAD CRAFT INC T-2569 COMMERCIAL BACKLASH BALL SCREW 38 OAL 30 TRAV NIB

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DAYTRonIC LINEAR SENSOR DS6000A

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CAIPO DIS 10292 35 X 30 SCREW ACTUATOR

BELOIT CORP. SCREW JACK 274817D023-0-00?5

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THREAD CRAFT INC T-6235 COMMERCIAL BACKLASH BALL SCREW 49 OAL 42 TRAV NIB

1244.5MM O.A.L. PRECISION BALL SCREW C-264

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IAI SINGLE AXIS ROBOT LINEAR ACTUATOR ISA-SXM-0-0-100?0-AQ

EMCOR 47.812" O.A.L. PRECISION BALL SCREW E-6630

FESTO 63MM BORE 500MM STROKE LINEAR DRIVE DGP-63-500-PPVA?-B

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TEMPOSonIC R SERIES LINEAR-POSITION SENSOR RHT0065UD601V01

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IDEAL .69-1.25D, SAE SIZE 12, CLAMP 62M12, BOX OF 10 *NEW*

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REX 5FT MAT TOP CHAIN LF5936-12 *NEW*