ABB BAILEY 1746N2 1769IQ32
在选择PLC机型时,主要考虑下面几点:
1.功能的选择。对于小型的PLC主要考虑I/O扩展模块、A/D与D/A模块以及指令功能(如中断、PID等)。
2.I/O点数的确定。统计被控制系统的开关量、模拟量的I/O点数,并考虑以后的扩充(一般加上10%~20%的备用量),从而选择PLC的I/O点数和输出规格。
3.内存的估算。用户程序所需的内存容量主要与系统的I/O点数、控制要求、程序结构长短等因素有关。一般可按下式估算:存储容量=开关量输入点数×10+开关量输出点数×8+模拟通道数×100+定时器/计数器数量×2+通信接口个数×300+备用量。
4.分配I/O点。分配PLC的输入/输出点,编写输入/输出分配表或画出输入/输出端子的接线图,接着就可以进行PLC程序设计,同时进行控制柜或操作台的设计和现场施工。
5.程序设计。对于较复杂的控制系统,根据生产工艺要求,画出控制流程图或功能流程图,然后设计出梯形图,再根据梯形图编写语句表程序清单,对程序进行模拟调试和修改,直到满足控制要求为止。
6.控制柜或操作台的设计和现场施工。设计控制柜及操作台的电器布置图及安装接线图;设计控制系统各部分的电气互锁图;根据图纸进行现场接线,并检查。
7.应用系统整体调试。如果控制系统由几个部分组成,则应先作局部调试,然后再进行整体调试;如果控制程序的步序较多,则可***行分段调试,然后连接起来总调。
8.编制技术文件。技术文件应包括:可编程控制器的外部接线图等电气图纸,电器布置图,电器元件明细表,顺序功能图,带注释的梯形图和说明。
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HEIDENHAIN ROD 4626180003012-0?3 *USED*
KEPCO EFX050T-1 POWER SUPPLY *USED*
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LOT OF 2 ALLEN BRADLEY 42182-800-01 *USED*
GENERAL ELECTRIC CR120A04002AA (AS PICTURED) *USED*
QUARTECH 8551 POWER SUPPLY 2.0VDC, 1.5AMP *USED*
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ABB S 223 K 10 A *USED*
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JOHNSON CONTROLS A350PS-2C *USED*
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SUMITOMO AF-3100 AC DRIVE AF3122-011-U *NEW*
HONEYWELL RM7840L1075 *NEW IN A BOX*
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ACME / STANDARD POWER SPWS-2436 120-240V INPUT *USED*
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McDONELL & MILLER 143800 *NEW IN A BOX*
KLOCKNER MOELLER ZM-6-PKZ 2 *USED*
EFECTOR LK7022 LEVEL SENSOR *USED*
IFM OT5013 *USED*
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CLAROSTAT DJA1N0565105UA *NEW IN A BOX*
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RELIANCE ELECTRIC 57C385 PROCESSOR BATTERY *NEW IN A BO...
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LEVITON 5334-I *NEW IN A BOX*
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MAC 413A-BBA-DM-DJA?J-1JD *USED*
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FUJI ELECTRIC EG53A *NEW*
INTERNATIONAL POWER IHC24-2.4 POWER SUPPLY 24VAC 2.4A *...
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HONEYWELL MICRO SWITCH 301LS8 *NEW IN BOX*
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AKAPP HOLLAND C700120 *USED*
TB WOOD'S MICRO-INVEVRTER XF***002-0B
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FIREYE R9105P5002 *USED*
VARIAN MR-13-05 *USED*
SUTTON PRESS BLOWER PB45B *USED*
CORCOM 5VR1 F7202 EMI FILTER 120/250V *USED*
EUROTHERM CHESSELL 4103C *USED*
BOBST 704-1095-03 POWER SUPPLY *USED*
AC TECH LINE VOLTAGE BOARD 962-004 *NICE*
LANTECH 55004101 *USED*
LIBERTY INDUSTRIES R-12340PC REV.2 *USED*
LANTECH 55003202 *USED*
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