1771-IA控制模块

详情描述：

模拟量，如电流、电压、温度、压力等等，它的大小是连续变化的。工业生产，特别是连续型生产过程，常要对这些物理量进行控制。
作为一种工业控制电子装置，PLC若不能对这些量进行控制，那是一大不足。为此，各PLC厂家都在这方面进行大量的开发。目前，不仅大型、中型机可以进行模拟量控制，就是小型机，也能进行这样的控制。
PLC进行模拟量控制，要配置有模拟量与数字量相互转换的A／D、D／A单元。它也是I/O单元，不过是特殊的I/O单元。
A/D单元是把外电路的模拟量，转换成数字量，然后送入PLC。D/A单元，是把PLC的数字量转换成模拟量，再送给外电路。
作为一种特殊的I/O单元，它仍具有I/O电路抗干扰、内外电路隔离，与输入输出继电器（或内部继电器，它也是PLC工作内存的一个区。可读写）交换信息等等特点。
这里的A/D中的A，多为电流，或电压，也有为温度。D/A中的A，多为电压，或电流。电压、电流变化范围多为0～5V，0～10V，4～20mA。有的还可处理正负值的。
这里的D，小型机多为8位二进制数，中、大型多为12位二进制数。
A/D、D/A有单路，也有多路。多路占的输入输出继电器多。
有了A/D、D/A单元，余下的处理都是数字量，这对有信息处理能力的PLC并不难。中、大型PLC处理能力更强，不仅可进行数字的加、减、乘、除，还可开方，插值，还可进行浮点运算。有的还有PID指令，可对偏差制量进行比例、微分、积分运算，进而产生相应的输出。计算机能算的它几乎都能算。
这样，用PLC实现模拟量控制是完全可能的。控制的单位值可小到212分之一的测量程值，多数也是足够的。
PLC进行模拟量控制，还有A/D、D/A组合在一起的单元，并可用PID或模糊控制算法实现控制，可得到很高的控制质量。
用PLC进行模拟量控制的好处是，在进行模拟量控制的同时，开关量也可控制。这个优点是别的控制器所不具备的，或控制的实现不如PLC方便。
当然，若纯为模拟量的系统，用PLC可能在性能价格比上不如用调节器。这也是应当看到的。

FANUC A16B-1211-0040/06A MEMORY BOARD / MODULE A16B1211004006A
Fanuc A16B-1211-0040/06A Board A16B-1211-0040
Fanuc A16B-1211-0040 Memory Board A16B 1211 0040
Fanuc A16B-1211-0040 Memory  Board A16B 1211 0040
Fanuc A16B-1211-0040 CPU Memory Card Board A16B-1211-004
Fanuc A16B-1211-0040 CPU MEMORY BOARD
Fanuc A16B-1211-0040 CPU Board A16B-1211-0040/07A
FANUC A16B-1211-0040 CPU BOARD , tested
FANUC A16B-1211-0040 CPU BOARD , tested
FANUC A16B-1211-0040 CPU BOARD
Fanuc A16B-1211-0030-03A Board ""
Fanuc A16B-1211-0030-03A Board
FANUC A16B-1211-0030/04A CPU MEMORY BOARD A16B-1211-0030, A16B12110030
Fanuc A16B-1211-003-0/04A CPU Board
Fanuc A16B-1211-0030/04A Circuit Board - A16B12110030
Fanuc A16B-1211-0030/03A Memory Circuit Board WOW
Fanuc A16B-1211-0030/03A Memory Circuit Board  WOW
FANUC A16B-1211-0030/03A CPU MEMORY BOARD A16B-1211-0030, A16B12110030
Fanuc A16B-1211-0030/03A CPU Board
FANUC A16B-1211-0030/02A MEMORY BOARD
Fanuc A16B-1211-0030/02A CPU Board A16B12110030
Fanuc A16B-1211-0030/02A Circuit Board A16B12110030
Fanuc A16B-1211-0030/02A Board
Fanuc A16B-1211-0030/02A Board A16B-1211-0030
FANUC A16B-1211-0030 CPU MEMORY BOARD ( IN STATIC WRAP)
Fanuc A16B-1211-0030 CNC Control Board VGC!!! W/Guarantee Free Shipping
FANUC A16B-1211-0030 BOARD
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/04A 30H88T -
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/04A - Parts Only
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/04A -  No
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/03A PSI Services - Refurbished
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/03A - Refurbished
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/02A FDA1204 -
Fanuc A16B-1211-0030 Board /04A A16B-1211-0030/02A -
Fanuc A16B-1211-0030 /04A CNC Shared Ram Memory Board A16B12110030/04A
FANUC A16B-1211-0030 /04A CIRCUIT BOARD ( IN STATIC BAG)
FANUC A16B-1211-0030 /04A  CIRCUIT BOARD ( IN STATIC BAG)
Fanuc A16B-1211-003 Memory Board
FANUC A16B-1211-003 CIRCUIT BOARD ***XLNT***
FANUC A16B-1211-003 0/04A MEMORY BOARD
FANUC A16B-1210-0972/04B CIRCUIT BOARD, #212312
Fanuc A16B-1210-0970/04B Robotics Control Board WOW
Fanuc A16B-1210-0970/04B Robotics Control Board  WOW
FANUC A16B-1210-0970/04B AXIS CONTROL CIRCUIT BOARD, #212315
Fanuc A16B-1210-0970/04B Axis Control Board
FANUC A16B-1210-0970/04B AXIS CIRCUIT BOARD GOOD CONDITION
FANUC A16B-1210-0970/04B AXIS CIRCUIT  BOARD  GOOD CONDITION
Fanuc A16B-1210-0970/03B Board A16B1210097003B -
FANUC A16B-1210-0970/03B 3 AXIS PC CONTROL BOARD A16B1210097003B
Fanuc A16B-1210-0970 Axis Control PC Board ! WOW !
FANUC A16B-1210-0970 Axis Control Board A16B-1210-0970/04B, 1 YEAR
FANUC A16B-1210-0970 AXIS CONTROL BOARD
FANUC A16B-1210-0950/02A RF MAIN CPU BOARD A16B-1210-0950, A320-1210-T956/02
Fanuc A16B-1210-0950/02A Main PC Board WOW
Fanuc A16B-1210-0950/02A Main PC Board  WOW
FANUC A16B-1210-0950/02A CPU BOARD A16B-1210-0950
FANUC A16B-1210-0950/02A CIRCUIT BOARD, #212306
FANUC A16B-1210-0950/02A CIRCUIT BOARD
Fanuc A16B-1210-0950/02A Axis Control CPU Board A320-1210-T956
Fanuc A16B-1210-0950 PC Board ! WOW !
FANUC A16B-1210-0950 CPU Board A16B-1210-0950/02A,  1 YEAR
Fanuc A16B-1210-0950 CPU Board
Fanuc A16B-1210-0940/03A Robot Control Board
FANUC A16B-1210-0940/03A PC BOARD CPU SUB A16B-1210-0940
FANUC A16B-1210-0940/03A Control Board - A16B1210094003A
FANUC A16B-1210-0940/03A CIRCUIT BOARD GOOD CONDITION
FANUC A16B-1210-0940/03A CIRCUIT BOARD  GOOD CONDITION
Fanuc A16B-1210-0940/03A Board A16B1210094003A -
FANUC A16B-1210-0940 Memory Board A16B-1210-0940/03A, TESTED,  1 YEAR
Fanuc A16B-1210-0940 CPU PC Board ! WOW !
Fanuc A16B-1210-0940 04A Sub Memory Board
FANUC A16B-1210-0940 /03A CIRCUIT BOARD
FANUC A16B-1210-0890-01 A16B1210089001 POWER SUPPLY MODULE BOARD CARD
Fanuc A16B-1210-0860/01A PC Board A16B12100860 Serial #959112 -
Fanuc A16B-1210-0860/01A Board
FANUC A16B-1210-0860 PC BOARD
FANUC A16B-1210-0820/03A 1/0 BOARD (JL1013)
FANUC A16B-1210-0820/03A 1/0 BOARD - Removed From A Working Machine
Fanuc A16B-1210-0820/02A Control Board
FANUC A16B-1210-0820/02A CIRCUIT BOARD
FANUC A16B-1210-0820 /03A ADD I/O BOARD
Fanuc A16B-1210-0810/04A PCB Printed Circuit Board
FANUC A16B-1210-0810/04A CIRCUIT BOARD
FANUC A16B-1210-0810/02A CIRCUIT BOARD
FANUC A16B-1210-0810 BOARD A16B12100810 *SOLD AS IS*
Fanuc A16B-1210-0810 / 04A Circuit Board - Removed From A Working Machine
FANUC A16B-1210-0801 MPG INTERFACE BOARD
FANUC A16B-1210-0801 BOARD
FANUC A16B-1210-0801 /09B MPG INTERFACE BOARD TAKEOUT
FANUC A16B-1210-0801 /07B MPG INTERFACE BOARD TAKEOUT MAKE OFFER !!