(1) installation environment PLC applies to industrial spot, to assure the dependability that its work, prolong the service life of PLC, surroundings condition should notice when installation: Environmental temperature is in 55 ℃ of 0 ～ inside limits; Relative humidity is inside 85% limits of 35% ～ (without frost) , the dirt of combustible or caustic gas, excessive and metallic grain are not had all round; Avoid to exceeding shakes and be pounded; Those who avoid sun's rays is point-blank with water splash shoot. 1, the installation method of S7-200 of means of installation of Ao Yuexin S7-200 PLC has two kinds: Motherboard installation and DIN slideway are installed. Motherboard installation is to use PLC airframe case the installing hole on 4 horn, secure its with bolt go up in negative. DIN slideway installation is the DIN clip that uses module to go up, secure module on the DIN slideway of a standard. Slideway is installed already can horizontal installation, OK also and perpendicular installation. 2, Ao Yuexin S7-300 PLC installs sketch map 2, frame of S7-300 series PLC is patulous 3, the Cpu communication interface of S7-300 series PLC 5, installation note: 1) all unit of PLC should be installed when cut off the power, disassemble; Do not wait for bits of lead head, metal sundry fall into airframe inside; 2) does not receive line of alternating current source input terminal to go up, lest burn out PLC; 3) output has relay model, transistor (what is appropriate to the occasion of high speed output is chosen) , output can take light load directly (LED indicator light) ; There is protection in circuit of 4) PLC output, because this answers to use the protector such as fuse in the series connection in exterior circuit, prevent laden short circuit to cause line of input of attaint PLC; 5) , output to take a line apart as far as possible, not be with dynamical line inside same pipeline or bundle up is together, lest appear,disturb signal, generation misoperation; Signal transmission line introduces screen line, and screen line ground connection; To make sure signal is reliable, ordinary control is in line of input, output 20 meters of less than; Patulous cable suffers noise report interference easily, should be far from equipment of dynamical line, high pressure to wait. 6) earthing terminal should become independent ground connection, do not carry series with other equipment ground connection, ground wire cuts a face into parts to not be less than 2mm2; Power of 7) auxiliary power source is lesser, the device that can drive small-power only (photoelectricity sensor) ; 8) general PLC all has have check the number a certain quantity ofly (namely terminal of clearing location wiring) , do not receive the line on; 9) is inputted / disconnecting time should be more than PLC sweep time; I/O of 10) PLC existence answers defer question, should try to notice in answering equipment quickly especially. 11) all round module as far as possible the space with certain put apart, in order to facilitate all round airframe ventilated and medicinal powder hot TAGS: OYES PLC Aoyue believes PLC of PLC Xi Menzi CNC Milling