1769-ADN
1769-ADN
1769-ADN
2. 存储器
PLC内的存储器主要用于存放系统程序、用户程序和数据等。
1)系统程序存储器
PLC系统程序决定了PLC的基本功能，该部分程序由PLC制造厂家编写并固化在系统程序存储器中，主要有系统管理程序、用户指令解释程序和功能程序与系统程序调用等部分。
系统管理程序主要控制PLC的运行，使PLC按正确的次序工作；用户指令解释程序将PLC的用户指令转换为机器语言指令，传输到CPU内执行；功能程序与系统程序调用则负责调用不同的功能子程序及其管理程序。
系统程序属于需长期保存的重要数据，所以其存储器采用ROM或EPROM。ROM是只读存储器，该存储器只能读出内容，不能写入内容，ROM具有非易失性，即电源断开后仍能保存已存储的内容。
※推荐品牌： ※推荐 公司
Allen-Bradley 厦门泰尼电气有限公司
Schneider 联系人：小黄（销售代表）
Triconex 固定电话：0592-6809319
FOXBORO ***:2917675397
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手机：18950191386
HP/Agilent 8722ES Network Analyzer,50MHz-40GHz
HP/Agilent 8720ES Vector Network Analyzer 50MHz-20GHz
E8241A PSG-L Series Performance Signal Generator, 20 G
HP/Agilent 83630A Synthesized Swept-Signal Generator
E4405B ESA-E Series Spectrum Analyzer, 9 kHz to 13.2 G
ENI 5100L-NMR 1.5-400MHz 100W Power Amplifier
HP/Agilent 8753D Network Analyzer, 30 kHz to 6 GHz
HP/Agilent 8563E Spectrum Analyzer, 30 Hz to 26.5 GHz
HP/Agilent 4194A Impedance/Gain-Phase Analyzer
5087-7281 Multiplier Amplifier Switch Splitter Assembly
HP/Agilent 8340A Synthesized Sweeper,10 MHz 26.5 GHz
HP/Agilent 8593E Spectrum Analyzer, 9 kHz to 22 GHz
HP/Agilent 8563A 9 kHz 22 GHz spectrum analyzer
HP/Agilent 8902A Measuring Receiver
HP/Agilent 85052B Standard Mechanical Calibration Kit
8560E Portable Spectrum Analyzer, 30 Hz to 2.9 GHz
HP/Agilent 8970B Noise Figure Meter, 10 MHz to 2047 MHz
HP/Agilent 8970B Noise Figure Meter, 10 MHz to 2047 MHz
HP/Agilent 85047A S-Parameter Test Set,300 kHz to 6 GHz
HP/Agilent 85047A S-Parameter Test Set,300 kHz to 6 GHz
HP/Agilent 5087-7277 TBR Mixer Brick 20 GHz
HP/Agilent 5087-7070 Yig Tuned Harmonic Mixer
HP/Agilent 5086-7884 YIG TUNED HARMONIC MIXER
HP/Agilent 5087-7031 Yig Tuned Harmonic Mixer
HP/Agilent 8648D Signal Generator,9 KHz - 4 GHz
HP/Agilent 5361B Pulse / CW Microw***e Counter, 40 GHz
HP/Agilent 11793A Microw***e Converter
HP/Agilent 8591C CABLE TV ANALYZER ,OPT 011 041 107 130
HP/Agilent 8648D Signal Generator,9 KHz - 4 GHz
E4422B ESG-A Series Analog RF Signal Generator, 4 GHz
E4422B ESG-A Series Analog RF Signal Generator, 4 GHz
HP/Agilent 85331-60033 Transfer Switch
HP/Agilent E5071-66571 source board
HP/Agilent 11848A Phase noise interface for the 3048A
HP/Agilent 5086-7620 Source Module Mixer
HP/Agilent 85134F Flexible Cable Set, 2.4 mm to 3.5 mm
HP/Agilent 5087-7034 Yig Tuned Harmonic Mixer
HP/Agilent E4403-60074 3GHZ RF Assy, opt 1D5
HP/Agilent E4403-60073 3GHZ RF Assy
HP/Agilent 5086-6981 YIG TUNED HARMONIC MIXER
HP/Agilent 5086-7472 SWITCH/DOUBLER, 40GHz
HP/Agilent 70590A OPT Z40 RF SECTION RANGE 26.5 - 40GHz
HP/Agilent 5086-7589 Switch, 40 GHz
Ando AQ8423B Optical Amplifier Analyzer
HP/Agilent 85332-60003 UTG Microw***e Switch,0.045~40G
HP/Agilent 83492A Optical clock recovery module
HP/Agilent 8971C Noise Figure Test Set,10MHz to 26.5GHz
HP/Agilent 5087-7238 Reference Switch
HP/Agilent E5071-61015 TBR Module,carpenter RCV RF
HP/Agilent 08719-60009 YIG TUNED OSCILATOR
HP/Agilent 5087-7081 YIG TUNED OSCILATOR
HP/Agilent 4xE5250A Low-leakage Switch Mainframe
HP/Agilent 4338B Milliohmmeter, 1 kHz
HP/Agilent 5086-7583 Low Band Microcircuit Assembly
5086-7465 TBR Microcircui
HP/Agilent 8720D/8722D Front Panel
HP/Agilent 85027B Directional Bridge, 10 MHz to 26.5 GH
HP/Agilent 85046A S-Parameter Test Set
HP/Agilent 85046A S-Parameter Test Set
HP/Agilent 85046A-P S-Parameter Test Set
HP/Agilent E4440-60170 LO synth/ sampling osc assembly