AS-B805-016 变频器
PLC具有通信联网的功能，它使PLC与PLC之间、PLC与上位计算机以及其他智能设备之间能够交换信息，形成一个统一的整体，实现分散集中控制。现在几乎所有的PLC新产品都有通信联网功能，它和计算机一样具有RS-232接口，通过双绞线、同轴电缆或光缆，可以在几公里甚至几十公里的范围内交换信息。
PLC之间的通讯网络是各厂家专用的，PLC与计算机之间的通讯，一些生产厂家采用工业标准总线，并向标准通讯协议靠拢，这将使不同机型的PLC之间、PLC与计算机之间可以方便地进行通讯与联网。
了解了PLC的基本结构，我们在购买程控器时就有了一个基本配置的概念，做到既经济又合理，尽可能发挥PLC所提供的佳功能。
基本指令系统特点
PLC的编程语言与一般计算机语言相比，具有明显的特点，它既不同于语言，也不同与一般的汇编语言，它既要满足易于编写，又要满足易于调试的要求。目前，还没有一种对各厂家产品都能兼容的编程语言。如三菱公司的产品有它自己的编程语言，OMRON公司的产品也有它自己的语言。但不管什么型号的PLC，其编程语言都具有以下特点：
ADMIRAL CORPORATION VINTAGE RADIACMETER IM-74 A PDR-27C
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LANTRONIX SECURE CONSOLE SERVER MODEL SCS400
LDC MILTON ROY AUTOZERO ACCESSORY
WDOG WDGCSM TIMER CARD REV D
NORPAK CORPORATION ANALOG VBI TV DATA RECEIVER TTX74X
LOT OF 5 DIGITAL RWX5K-01 REWRITABLE OPTICAL DISKS 1.2G
BYTEK S15-P MULTIPROGRAMMER
SIEMENS MICROMASTER 440 DRIVE 6SE6440-2UD15-5?AA1
MOTOROLA MVME 147 147SB-1 BOARD MVME147SB-1
WATERS HPLC 600S CONTROLLER & 616 PUMP
DELL I/O SERIAL PANEL WITH CABLE F3636
WATERS ALLIANCE 2695 SEPARATIONS MODULE & COLUMN HEATER
ALLEN BRADLEY REVERSING DRUM SWITCH 350-BAV SERIES B
NIB HP COMPLETE RACK KIT 274250-002 PROLIANT ML570
SIEMENS METER THERMIZER THERMOMETER
IBM THINKPAD 2504 PORT REPLICATOR DOCK & KEY 42W4638
IBM THINKPAD 2504 PORT REPLICATOR DOCK & KEY 41W6563
IBM LENOVO 2504 PORT REPLICATOR DOCK & KEY 42W4632
LOT OF 5 IBM 53P1223 SFP OPTICAL TRANSCEIVER 229204-001
TERRANOVA 906 CONVECTION GAUGE CONTROLLER W/ MKS GAUGE
IBM THINKPAD 2503 26R9061 DOCKING STATION WITH KEY
OLMAN INSTRUMENTS 30210 MODEL D CIRCUIT ANALYZER
DIGITAL DEC ASTEC H7876-AA 170 WATT POWER SUPPLY
DELL HITACHI U320 10K SCSI HARD DRIVE 146GB 8T576
HOSOKAWA MICRON AIR JET SIEVE PARTICLE SIZE ANALYZER
APPLE G4 CUBE 205W POWER ADAPTER M5849
PRIOR SCIENTIFIC H160NFP 110/120V 50/60HZ
SAMSUNG HL-R5667W LAMP ASSEMBLY
WATTSTOPPER OCCUPANCY SENSOR HB350 WITH MOUNT OESC200
IBM X SERIES 336 X336 POWER SUPPLY 24R2639 24R2640
VWR SCIENTIFIC DYLATHERM HOTPLATE 33918-432
RADCOM PRISM LITE ANALYZER W/ WAN FAST LAN OC-3C
RADCOM PRISM LITE ANALYZER W/ FAST LAN GIGA LAN
HP AGILENT 1142A PROBE CONTROL AND POWER MODULE
W-P INSTRUMENTS WPI 161 MICRO-IONTOPHOR?ESIS PROGRAMMER
MKS PDR-C-1C POWER SUPPLY READOUT UNIT
NATIONAL INSTRUMENTS PCI-6033E I/O BOARD DAQ
WAVETEK 4 MHz FUNCTION GENERATOR MODEL 182A
HP JETDIRECT 620N J7934A PRINT SERVER
HP JETDIRECT J6057A 615N PRINT SERVER
CLARISONIC MIA SONIC SKIN CLEANER
ALCATEL 4035 PCX4400 GRAPHITE RELFEX PHONE
GENUINE CISCO WIC 1DSU T1 INTERFACE CARD DSU/CSU
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GENUINE CISCO WIC-1B-U 1 PORT ISDN INTERFACE CARD
PRECISION SCIENTIFIC VACUUM OVEN MODEL 19
GENUINE CISCO 2 PORT SERIAL CARD WIC 2T
GENUINE CISCO WIC 1B-U V2 INTERFACE CARD WIC-1B-U-V2
GENUINCE CISCO 1 PORT SERIAL WAN CARD WIC 1T
CISCO NM-HDV W/ VWIC-1MFT-T1 PVDM 12
GENUINE CISCO VWIC 2MFT-T1 2 PORT MULTIFLEX CARD
EICO TRANSISTORIZED POWER SUPPLY MODEL 1020
CISCO BRI 4B-U MODULE NM-BRI-4B-U
GENUINE CISCO NM-1CE1T1-PRI 1 PORT NETWORK MODULE
SONY EVO-9800A VIDEO HI8 8mm VCR PLAYER RECORDER
HP AGILENT 54501A 100MHZ DIGITIZING OSCILLOSCOPE
FLUKE 80T-150U TEMPERATURE PROBE
CYCLADES TS2000 ROUTER LINUX TERMINAL 32 PORTS
HP AGILENT LOGIC ANALYZER 1650A
HP AGILENT 1650A LOGIC ANALYZER
WANDEL & GOLTERMANN DA-30C NETWORK ANALYZER W/ MODULES
60x 512MB HP SERVER MEMORY 175918-042 DDR PC1600R
NETLIST 4GB (4 x 1GB) DDR MEMORY NL9127RD64042 PC2100
FOSTEX PD2 PD-2 DIGITAL AUDIO DAT RECORDER
