1746-OA16參詳
1746-OA16參詳
1746-OA16參詳
MDX60A0150-503-4-00
3RW4436-2BC44
S0815350
3BSE004214R1
3RW4446-6BC44
UVZ7055
2098-DSD-HV030-SE
PP865A 3BSE042236R2
PP846A
6AV2 124-1GC01-0AX0
LFL1.133 2
6GK7243-1EX00-0XE0 3
SGMG-09V2ACS 1
DCS502B0450-51-2100000-000000000 1
6SL3353-6TE41-2BA3 - 3臺
R911325869
CIPR-CH70B4091ABB 1
3RW4900-0KC00 數量3
3RW4447-6BC44 數量1
3RW4444-6BC44 數量1
352-1AG34-7EA1 2
REM545BG226BAAA 1
REF543KM129BAAA 1
ATV312HU75N4 1
框架式斷路器E1B-1250/1250A 3P 42kA 抽出式PR122/P-LSIG
R911342495
R911406416
2711P-T7C21D8S 1 面價17157
2711P-RDB15C 1 面價94335
2711P-T9W22D8S 1 面價28690
YOKOGAWA DR241-02-33-1W/C2/H1/D2 DR24102331WC2H1D
YOKOGAWA DR241-00-31-1W/C2/H1/D2 DR24100311WC2H1D
YASKAWA ELECTRIC SGDB-33-DD SGDB33DD
YASKAWA ELECTRIC CACR-SR30BB1AF CACRSR30BB1AF
YASKAWA ELECTRIC CACR-SR20BB1AF CACRSR20BB1AF
WESTINGHOUSE 6968D55G02 6968D55G02
VAISALA SENSOR SYS DMP246 DMP246
TOSHIBA VT130G2-4330 VT130G24330
TELEMECANIQUE XBT-E015110 XBTE015110
TELEMECANIQUE TSX-SCM-2014 TSXSCM2014
TELEMECANIQUE ATS-46C48N ATS46C48N
TAYLOR ELECTRONICS 6204BZ10101G 6204BZ10101G
TAYLOR ELECTRONICS 1734FC14200A 1734FC14200A
TAVIS CORPORATION 10347-1 103471
SIEMENS 6SN1130-1DA11-0BA0 6SN11301DA110BA0
SIEMENS 6SE9-221-0DC40 6SE92210DC40
SIEMENS 6SE7-031-2TF60-Z 6SE70312TF60Z
SIEMENS 6SE7-027-2ED51 6SE70272ED51
SIEMENS 6ES7-416-2XL01-0AB0 6ES74162XL010AB0
SIEMENS 6ES5-944-7UB11 6ES59447UB11
SIEMENS 6ES5-526-3LF11 6ES55263LF11
SIEMENS 6ES5-526-3LA11 6ES55263LA11
SIEMENS 6DD1-606-3AC0 6DD16063AC0
SIEMENS 6AV3647-6BC54-1AP0 6AV36476BC541AP0
SICK OPTIC ELECTRONIC LMS211-30206 LMS21130206
SCOTT TURBON MIXER INC TMS-6 TMS6
SANYO DENKI B21M1K7MXR10-B B21M1K7MXR10B
SANYO DENKI B21M1K7MXR10 B21M1K7MXR10
RONAN ENGINEERING CO 3.6X12-2000 36X122000
RELIANCE ELECTRIC 86466-80R 8646680R
RELIANCE ELECTRIC 86466-3R 864663R
RELIANCE ELECTRIC 8108000 8108000
RELIANCE ELECTRIC 805401-7R 8054017R
RELIANCE ELECTRIC 805401-1S 8054011S
RELIANCE ELECTRIC 7C658 7C658
RELIANCE ELECTRIC 6SP44020 6SP44020
RELIANCE ELECTRIC 603515-5A 6035155A
RELIANCE ELECTRIC 57C-440A 57C440A
RELIANCE ELECTRIC 45C-15D 45C15D
RELIANCE ELECTRIC 45C-15C 45C15C
RELIANCE ELECTRIC 45C-15A 45C15A
RELIANCE ELECTRIC 45C-15 45C15
RELIANCE ELECTRIC 11C83K 11C83K
POWERTEC INDUSTRIAL MOTORS INC C0202-S4CH099 C0202S4CH099
PACKARD C384V00 C384V00
ORMEC SAC-D37R/I SACD37RI
ORMEC MAC-B330G/K1A MACB330GK1A
OMRON V530-R150EP-3 V530R150EP3
OMRON F200-C10E F200C10E
OMRON F200-C10E F200C10E
NORDSON 303541A 303541A
MOORE PRODUCTS 15799-91-8 15799918
MOORE PRODUCTS 15494-126 15494126
MODICON P420 P420
MODICON MM-PM21-300 MMPM21300
MODICON AS-S911-000 ASS911000
MODICON AS-P420-000 ASP420000
MODICON AS-C484-266 ASC484266
MODICON AS-C484-065 ASC484065
MODICON AS-584M-240 AS584M240
MODICON AS-584L-121 AS584L121
MODICON AS-584A-038 AS584A038
MODICON AS-584A-036 AS584A036
MODICON AS-506P-F32 AS506PF32
MODICON 160-CPU-42401 160CPU42401
MODICON 140-CPU-651-50 140CPU65150
MITSUBISHI MDS-B-SP-550 MDSBSP550
MITSUBISHI FR-Z320-22K FRZ32022K
MITSUBISHI A3H-CPU-P21 A3HCPUP21
MICROWAVE DATA SYS 4790ARBB0B21E50FN 4790ARBB0B21E50F
功能模塊獨立的概念是功能模塊化、抽象、信息隱蔽和局部化概念的直接結果。
抽象是指對事物、狀態或過程之間所存在的某些相似的方面集中和概括起來,而暫時忽略他們之間的差異,即考慮抽象事物的本質特徵而暫時不考慮他們的細節。信息隱蔽是指再設計功能模塊時使得一個功能模塊內所包含的信息(過程或數據),對於不需要這些信息的功能模塊來說是不能訪問的。信息隱蔽原則對於以後在軟件維護期間修改軟件時會帶來·大的好處,因為大量數據和過程是軟件的其他部分所不能覺察的,因而再對某個功能模塊修改時就不大會影響到軟件的其他部分,所謂局部化是指把一些關係密切的軟件元素在物理位置上彼此靠近。
功能模塊獨立性是通過制定具有單一功能並且和其他功能模塊沒有過多聯係的功能模塊來實現的。每個功能模塊只涉及該軟件要求的一個具體子功能,而且與軟件結構的其他部分的接口是簡單的。
功能模塊獨立性好的軟件接口簡單,易於編制,獨立的功能模塊也比較容易測試和維護,限制了功能模塊之間由於聯係緊密而引起的修改副作用。獨立性是保證軟件質量的重要因素。