可編程序控制器（以下簡(jiǎn)稱PLC）是在程序控制器和微機(jī)控制器的基礎(chǔ)上發(fā)展起來(lái)的微機(jī)技術(shù)和繼電器常規(guī)控制概念相結(jié)合的產(chǎn)物。從廣義上講，PLC是一種計(jì)算機(jī)系統(tǒng)，比一般計(jì)算機(jī)具有更強(qiáng)的與工業(yè)過(guò)程相連接的輸入輸出接口，并已成為自動(dòng)化控制系統(tǒng)的基本裝置。PLC已經(jīng)廣泛應(yīng)用于機(jī)械、冶金、化工、汽車、輕工等行業(yè)中，已基本取代了傳統(tǒng)的繼電器和接觸器的邏輯控制。用PLC來(lái)控制系統(tǒng)設(shè)備，其工作的可靠性要比單純繼電器和接觸器控制大大提高。就PLC本身而言，平均*時(shí)間一般已可達(dá)3~5萬(wàn)小時(shí)；而三菱的F系列，據(jù)稱其平均*時(shí)間已達(dá)30萬(wàn)小時(shí)。所以，整個(gè)PLC控制系統(tǒng)的可靠性，主要取決于PLC的外圍設(shè)備，比如輸入器件中的行程開關(guān)、按鈕、接近開關(guān)，輸出器件中的接觸器、繼電器和電磁閥等。另外，從軟件程序的編制來(lái)考慮，如果能編制出一個(gè)帶有監(jiān)控的程序，對(duì)提高系統(tǒng)的可靠性也有很大好處。下面就如何提高PLC控制系統(tǒng)的可靠性進(jìn)行一些探討。

Yaskawa SGMAH-04AAA41 SGMAH04AAA41 SGMAH 04AAA41 AC Servo Motor

Super Vexta Oriental UDK5114N 5-Phase Driver

Mitsubishi HC-PQ13 HCPQ13 AC Servo Motor

Panasonic MSMA011A1E AC Servo Motor

Panasonic MSMA011A1A AC Servo Motor

Oriental Motor SS32MA-J SS32MAJ Control Pack C

Mitsubishi MR-J2S-40A MRJ2S40A Servo Drive C

Copley Controls 422 Servo Drive Amplifier

Panasonic Minas MSD043A1XX AC Servo Driver

Oriental Motor ASD24A-A ASD24AA Servo Driver Deformed C

Super Vexta KBLD120-C KBLD120C AC Servo Driver AC200/230V

Yaskawa SGM-01B312 SGM01B312 SGM 01B312 AC Servo Motor

Oriental Motor 2IK6GN-A 2IK6GNA Induction Motor 6W

Tohan Denshikiki TD-112KJ Servo Driver U

Maxon Motor 4-Q-DC 4QDC Servo Amplifier C

Elrest 10603416 16083202 Elacan II ACE Cooler UW 1.90

Yoshida PS7DW-40 PX7DW-40V4 Terminal Block C

Lenze 33.532E 33.532 E 33532E DC Drive

Sanyo Denki P50B08075DXS4Y BL Super AC Servo Motor 750W 6.0A

Mitsubishi MR-J2-40C MRJ240CS Servo Drive C

Mitsubishi HC-MI4362 HCMI4362 AC Servo Motor

1949572-101 90325-241 1949572101 90325241 Motor

Maxon Motor Control Linear Servo U

Rorze RD-053 RD053 5P Pulse Motor Driver

IEI Accura9 Automatic Dispenser C

Mitsubishi MR-J2S-40A MRJ2S40A AC Servo Drive C

Mitsubishi MR-J2-201A MRJ2201A AC Servo Motor

Panasonic AMKB200810LAK AC Servo Motor

Synair 890 030 764 0172 8900307640172

Yaskawa SGDA-A5AP SGDAA5AP SGDA A5AP Servo Drive

TCD-51ST TCD51ST Servo Driver

Oriental Motor SS22M Control Pack C

Yaskawa SGMP-02V314T SGMP02V314T AC Servo Motor U

Yaskawa SGDA-02BP SGDA02BP Servopack Drive

ANSALDO Type SVVP3.7FB Silcovert V Inverter

Mitsubishi HC-PQ23 HCPQ23 AC Servo Motor

Yaskawa UGRMEM-02SSW21 UGRMEM02SSW21 Motor

Yaskawa SGDA-02AS SGDA02AS SGDA 02AS 1 Phase 4.0 amps Servopack

Panasonic MQDA023D1A AC Servo Driver U

Samsung CSD3-01BX2 CSD301BX2 Driver C

Panasonic ADKF50B4SE Servo Driver U

Clifton AS-780D-131E AS780D131E w/ CH-4452 CH4452 Motor

Rapidsyn 23BLS-03S-02 23BLS03S02 Brushless DC Servo Motor

Delta ASD-A0221LA ASDA0221LA AC Servo Drive 110 0-200Hz 1.7A

Panasonic MSD153A1WE AC Servo Driver 1.5kW

Panasonic M8GA M8IA25G4L Motor

Teknic 716-546-3212 M-2330-115 Servo Motor

Panasonic MSDA3A3A1A AC Servo Driver 37V 1.0A 0-333.3Hz 50W

Copley Controls 7225DC 7225DC Servo Amplifier Drive

Panasonic M8RA25G4L Motor

Yaskawa SGMM-A2C313 SGMMA2C313 AC Servo Motor

Pacific Scientific SC403-002 SC403002 Servo Controller C

Panasonic MDDDT5540001 AC Servo

Japan Servo KH56KM2UO37 Motor