PMEUCM0302通讯模块面价
PMEUCM0302通讯模块面价
PMEUCM0302通讯模块面价
PMEUCM0302通讯模块电路图
PMEUCM0302通讯模块原理图
PMEUCM0302通讯模块说明书
PMEUCM0302功能模块独立的概念是功能模块化、抽象、信息隐蔽和局部化概念的直接结果。
PMEUCM0302抽象是指对事物、状态或过程之间所存在的某些相似的方面集中和概括起来,而暂时忽略他们之间的差异,即考虑抽象事物的本质特征而暂时不考虑他们的细节。
PMEUCM0302信息隐蔽是指再设计功能模块时使得一个功能模块内所包含的信息(过程或数据),对于不需要这些信息的功能模块来说是不能访问的。信息隐蔽原则对于以后在软件维护期间修改软件时会带来极·的好处,因为大量数据和过程是软件的其他部分所不能觉察的,因而再对某个功能模块修改时就不大会影响到软件的其他部分,所谓局部化是指把一些关系密切的软件元素在物理位置上彼此靠近。
PMEUCM0302功能模块独立性是通过制定具有单一功能并且和其他功能模块没有过多联系的功能模块来实现的。每个功能模块只涉及该软件要求的一个具体子功能,而且与软件结构的其他部分的接口是简单的。
PMEUCM0302功能模块独立性好的软件接口简单,易于编制,独立的功能模块也比较容易测试和维护,限制了功能模块之间由于联系紧密而引起的修改副作用。独立性是保证软件质量的重要因素。
LKEB-4030
6AU1445-2AD00-0AA1
MegaVert-GM075AN
6SG7065-0EB60-0
IC695ALG508-EB
IC695ALG508
IS215UCVEH2AF
KB434C
PMEUCM0302
6FC5373-0AA00-0AA2
6FC5850-3XG20-6YA0
PMM13.3-A216-000
PMC25.2-002
MDX60A0074-5A3-4-00
880-50510-000
6181P-12A2SW71DC
SEL-G-2-AC-100
VE3008
6RA7025-6DV62-0
136188-02
AC800PEC PC D235
AC800PEC PC D231
6SN1146-1BB00-0DA1
6AV6644-8AB20-0AA1
6AV6644-8AB20-0AA1
A06B-6134-H303#A
KJ2005X1-BA1 VE3007
xbtgt7340
X20BC0087
X20CP1381
MDX60A1100-503-4-00
OKUMA BL-D-30-A BLD30A
NUM 1020M 1020M
NOVAR CONTROLS CORP 750019110 750019110
NORTEL NETWORKS NT8D37BA-07 NT8D37BA07
NACHI SC35F-01 SC35F01
MODICON MM-PMC1-200 MMPMC1200
MODICON AS-C384-000 ASC384000
MODICON AS-B883-201 ASB883201
MODICON AS-506P-F32 AS506PF32
MODICON AS-384B-000 AS384B000
MITSUBISHI K419C K419C
MITSUBISHI FR-A740-00860-TF FRA74000860TF
MITSUBISHI AD5-1H-S3 AD51HS3
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MEASUREX 51402615-800 51402615800
MEASUREX 51401635-150 51401635150
MEASUREX 053251-00 05325100
MARCONI PC-28-155MM2 PC28155MM2
MAGNETEK GPD515C-B224 GPD515CB224
LORAIN PRODUCTS 486531001 486531001
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KEYENCE CORP LS-5041 LS5041
KEYENCE CORP LC-D1A LCD1A
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HORNER ELECTRIC HE697BEM600 HE697BEM600
HONEYWELL XL100CUUKL XL100CUUKL
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GIDDINGS & LEWIS 401-34401-00 4013440100
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FANUC A06B-0502-B755 A06B0502B755
FANUC A06B-0502-B754 A06B0502B754
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CLECO TME-111-15-U TME11115U
BOSCH 1070071339 1070071339
BERTHOLD 81072-2/LB352-2 810722LB3522
BARBER COLMAN GCM-84221-1-0-1 GCM84221101
BARBER COLMAN GCM-84221-1 GCM842211
AUTOMATED LOGIC M4106P M4106P
AUTOMATED LOGIC M4106 M4106
AUTOMATED LOGIC LGRME LGRME
ASEA BROWN BOVERI MEM86-192K-64KRAM MEM86192K64KRAM
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ADEPT TECH 10350-01060 1035001060
ADEPT TECH 10330-11351 1033011351
ADEPT TECH 10000-310 10000310