在數(shù)據(jù)運(yùn)算過(guò)程中，機(jī)內(nèi)的數(shù)據(jù)傳送是*的。運(yùn)算可能要涉及不同的工作單元，數(shù)據(jù)需在他們之間傳送；運(yùn)算可能會(huì)產(chǎn)生一些中間數(shù)據(jù)，這需要傳送到適當(dāng)?shù)牡胤綍簳r(shí)存放；有時(shí)機(jī)內(nèi)的數(shù)據(jù)需要備份保存，這要找地方把這些數(shù)據(jù)存儲(chǔ)妥當(dāng)。總之，對(duì)一個(gè)涉及數(shù)據(jù)運(yùn)算的程序，數(shù)據(jù)管理是很重要的。

此外，二進(jìn)制和 BCD 碼的轉(zhuǎn)換在數(shù)據(jù)管理中也是很重要的。

IC693CBL332！GE模塊@140EIA92100IC693CBL332！GE模塊@140EIA92100
 FX系列PLC梯形圖中的編程元件的名稱有字母和數(shù)字組成，他們分別表示元件的類型和元件號(hào)，如Y10，M129。輸入繼電器與輸出繼電器的元件號(hào)用八進(jìn)制數(shù)表示，八進(jìn)制數(shù)只有0~7這8個(gè)數(shù)字符號(hào)，遵循“逢8進(jìn)1”的運(yùn)算規(guī)則。例如，八進(jìn)制數(shù)X17和X20是兩個(gè)相鄰的整數(shù)。表3–3給出了FX2N系列PLC的輸入/輸出繼電器元件號(hào)。

1．輸入繼電器(X)  
 輸入繼電器是PLC接收外部輸入的開(kāi)關(guān)量信號(hào)的窗口。PLC通過(guò)光耦合器，將外部信號(hào)的狀態(tài)讀入并存儲(chǔ)在輸入映像寄存器中。輸入端可以外接常開(kāi)觸點(diǎn)或常閉觸點(diǎn)，也可以接多個(gè)觸點(diǎn)組成的串并聯(lián)電路或電子傳感器(如接近開(kāi)關(guān))。在梯形圖中，可以多次使用輸入繼電器的常開(kāi)觸點(diǎn)和常閉觸點(diǎn)。  
 圖3–6是一個(gè)PLC控制系統(tǒng)的示意圖，X0端子外接的輸入電路接通時(shí)，它對(duì)應(yīng)的輸入映像寄存器為1狀態(tài)，斷開(kāi)時(shí)為0狀態(tài)。輸入繼電器的狀態(tài)惟一地取決于外部輸入信號(hào)的狀態(tài)，不可能受用戶程序的控制，因此在梯形圖中不能出現(xiàn)輸入繼電器的線圈。

因?yàn)镻LC只是在每一掃描周期開(kāi)始時(shí)讀取輸入信號(hào)，輸入信號(hào)為ON或OFF的持續(xù)時(shí)間應(yīng)大于PLC的掃描周期。如果不滿足這一條件，可能會(huì)丟失輸入信號(hào)。
 2. 輸出繼電器(Y)
 輸出繼電器是PLC向外部負(fù)載發(fā)送信號(hào)的窗口。輸出繼電器用來(lái)將PLc的輸出信號(hào)傳
送給輸出模塊，再由后者驅(qū)動(dòng)外部負(fù)載。如果圖3-6梯形圖中Y4的線圈“通電”，繼電器型輸出模塊中對(duì)應(yīng)的硬件繼電器的常開(kāi)觸點(diǎn)閉合，使外部負(fù)載工作。輸出模塊中的每一個(gè)硬件繼電器僅有一對(duì)常開(kāi)觸點(diǎn)，但是在梯形圖中，每一個(gè)輸出繼電器的常開(kāi)觸點(diǎn)和常閉觸點(diǎn)都可以多次使用。
AI Module +-5V
6ES5498-1AA61
 AI Module 0,05/.5V
6ES5498-1AA11
 AI Module 10V
6ES5498-1AA31
 AI Module 1V
6ES5498-1AA21
 AI Module 20mA
6ES5498-1AA41
 AI Module 4-20mA 2-wire
6ES5498-1AA51
 AI Module 4-20mA 4-wire
6ES5498-1AA71
 AI Module 60V/.5A
6ES5498-1AB11
 Akku for PS955 ( -3xx4x types )
6ES5980-0NC11
 CP578
6ES5578-0AA11
 Data Processing Module MV f. Siwarex WPSI
7MH4405-1AA00
 Enable supply
6ES5958-4UA11
 FAN Replacement Kit for PS955 (-3LC12/-3LC13/-3LF11)
6ES5988-3LB11
 FAN Replacement Kit for PS955 (3LC14/-3LF12) and EG184
6ES5988-3LB21
 FAN TRAY for Extension Rack 184
6ES5988-3NA11
 FAN TRAY for Extension Rack 184
6ES5988-3LA21
 FAN TRAY for Extension Rack 184
6ES5988-3LA11
 fiber optics module
6ES5307-0MM11
 IM300 connecting to ER701-0/701-1 central
6ES5300-5LB11
6ES5300-5LA11
 IM300 connecting to EU183U central
6ES5300-3AB11
 IM300 connecting to EU184U/187U central
6ES5300-5CA11
 IM301 EU182U until 200m
6ES5301-5AA12
6ES5301-5AA13
 IM301 EU183U until 200m
6ES5301-3AB13
6ES5301-3AB11
 IM301 EU184U/187U until 200m
6ES5301-5CA12
 IM302
6ES5302-3KA11
 IM304 EU183U/185U until 600m
6ES5304-3UA11
6ES5304-3UA12
 IM304 EU183U/185U until 600m
6ES5304-3UB11
 IM307 EU183U/185U until 4500m)
6ES5307-3UA11
 IM310
6ES5310-3AB11
 IM310 EU182
6ES5310-5AA12
 IM311
6ES5311-3KA11
 IM312 incl. Cable
6ES5312-5AA12
6ES5312-5AA13
6ES5312-5AA21
6ES5312-5AA31
 IM312 incl. Cable (EU183U )
6ES5312-3AB11 0,5m
6ES5312-3AB12 0,5m
6ES5312-3AB31 1,5m
6ES5312-3AB32 1,5m
 IM312 incl. Cable (EU184U/187U )
6ES5312-5CA11 0,5m
6ES5312-5CA12 0,5m
6ES5312-5CA21 1,5m
6ES5312-5CA22 1,5m
 IM314 EU183U/184U until 600m
6ES5314-3UA11
 IM317 EU183U/184U until 4500m
6ES5317-3UA11
 IM318A EU S5-115U/135/155U
6ES5318-3UA11
 IM324 EU S5-115H /155H
6ES5324-3UR11
 Interface component
7MH1704-8DA
 Junction and Distribution Box
7MH4710-1BA
 Monitoring module 313
6ES5313-5AA11
 Papst fan 115VAC
4606N
 real-time clock DCF 77
T148-HS5T-1004/1-A1
 S5 Monitoring Module 313
6ES5313-3AA12
 S5-130/150 counter module
6ES5000-1AA31
 S5-130/150 Memory Module
6ES5350-5AA21
 S5-130/150U PS955 PS 115/230VAC 40A
6ES5955-3LF11
6ES5955-3LF12
6ES5955-3LF31
 S5-135/155 CPU923 (Coordinator)
6ES5923-3UC11
 S5-135/155 CPU923 (Coordinator)
6ES5923-3UA11
 S5-135/155 dust filter
6ES5981-0EA41
 S5-135/155U 16AI non-floating
6ES5465-4UA11
6ES5465-4UA12
6ES5465-4UA13
 S5-135/155U 16DI 115/240VAC floating
6ES5436-4UA11
6ES5436-4UA12
 S5-135/155U 16DI 24/48/60VDC floating
6ES5431-4UA12
6ES5431-4UA11
 S5-135/155U 16DI/16DO 24 VDC 0,5A
6ES5482-4UA11
 S5-135/155U 16DO 115/240VAC 2A floating
6ES5456-4UA11
6ES5456-4UA12
 S5-135/155U 16DO 24-60VAC
6ES5455-4UA12
 S5-135/155U 16DO 24VDC 2A floating
6ES5454-4UA11
6ES5454-4UA12
6ES5454-4UA13
6ES5454-4UA14
 S5-135/155U 16DO 24VDC 2A floating
6ES5453-4UA11
6ES5453-4UA12
 S5-135/155U 16RO 250VAC
6ES5458-4UC11
 S5-135/155U 16RO 60VDC 0,5A floating
6ES5458-4UA11
6ES5458-4UA12
6ES5458-4UA13
 S5-135/155U 32DI 24VDC floating
6ES5432-4UA11
6ES5432-4UA12
 S5-135/155U 32DI 24VDC floating
6ES5430-4UA11
6ES5430-4UA12
6ES5430-4UA13
6ES5430-4UA14
 S5-135/155U 32DI 24VDC non-floating
6ES5420-4UA11
6ES5420-4UA12
6ES5420-4UA13
6ES5420-4UA14
 S5-135/155U 32DO 24VDC 0,5A floating
6ES5451-4UA11
6ES5451-4UA12
6ES5451-4UA13
6ES5451-4UA14
 S5-135/155U 32DO 24VDC 0,5A non-floating
6ES5441-4UA11
6ES5441-4UA12
6ES5441-4UA13
6ES5441-4UA14
 S5-135/155U 4AI
6ES5463-4UA13
6ES5463-4UA12
6ES5463-4UA11
 S5-135/155U 8AI
6ES5466-3LA11
 S5-135/155U 8AI floating
6ES5460-4UA11
6ES5460-4UA12
6ES5460-4UA13
 S5-135/155U 8AO +-10V floating
6ES5470-4UB11
6ES5470-4UB12
6ES5470-4UB13
 S5-135/155U 8AO +-10V/0-20mA floating
6ES5470-4UA11
6ES5470-4UA12
6ES5470-4UA13
 S5-135/155U 8AO 1-5V/4-20mA floating
6ES5470-4UC13
6ES5470-4UC12
 S5-135/155U 8DI 115/240VAC
6ES5436-4UB11
 S5-135/155U 8DO 115-230VAC
6ES5456-4UB11
6ES5456-4UB12
 S5-135/155U connection bacle 731-1
6ES5731-1CB00
6ES5731-1BD20
6ES5731-1BF00
 S5-135/155U connection bacle 731-6
6ES5731-6AG00
 S5-135/155U Connector f. IM310
6ES5760-0AA11
 S5-135/155U Connector f. IM312/IM301
6ES5760-0AB11
 S5-135/155U Connector f. IM314
6ES5760-1AA11
 S5-135/155U Connector f. IM314R
6ES5760-0HA11
 S5-135/155U CPU922 R processor
6ES5922-3UA11
 S5-135/155U CPU928A
6ES5928-3UA11
6ES5928-3UA12
 S5-135/155U CPU928A Last Edition
6ES5928-3UA21
 S5-135/155U CPU928B
6ES5928-3UB11
6ES5928-3UB12
 S5-135/155U CPU928B Last Edition
6ES5928-3UB21
 S5-135/155U CPU946
6ES5946-3UA11
 S5-135/155U CPU946
6ES5946-3UA21
6ES5946-3UA22
6ES5946-3UA23
 S5-135/155U CPU946 R
6ES5946-3UR21
6ES5946-3UR12
 S5-135/155U CPU947
6ES5947-3UA11
6ES5947-3UA21
6ES5947-3UA22
 S5-135/155U CPU947 R
6ES5947-3UR21
 S5-135/155U CPU948 1664kB
6ES5948-3UA21
6ES5948-3UA23
 S5-135/155U CPU948 640kB
6ES5948-3UA11
6ES5948-3UA12
6ES5948-3UA13
 S5-135/155U CPU948R 1600kB
6ES5948-3UR23
6ES5948-3UR21
 S5-135/155U DI 434 floating
6ES5434-4UA12
 S5-135/155U EU 183 (excl. PS / CPU's)
6ES5183-3UA22
6ES5183-3UA21
 S5-135/155U EU 183 (excl.PS / CPU's)
6ES5183-3UA13
6ES5183-3UA12
 S5-135/155U EU 184 (excl.PS / Fan)
6ES5184-3UA21
6ES5184-3UA11
 S5-135/155U EU 185 excl.PS/CPU's
6ES5185-3UA11
6ES5185-3UA13
6ES5185-3UA22
6ES5185-3UA31
 S5-135/155U EU 187 (excl.PS / CPU's)
6ES5187-5UA11
 S5-135/155U Frontconnector 20-PIN
6ES5497-4UB42
 S5-135/155U Frontconnector 25-PIN
6ES5497-4UB22
 S5-135/155U Frontconnector 42-PIN
6ES5497-4UA42
 S5-135/155U Frontconnector 42-PIN
6ES5497-4UA22
 S5-135/155U Frontconnector 42-PINl
6ES5497-4UA12
 S5-135/155U IM308A
6ES5308-3UA11
6ES5308-3UA12
 S5-135/155U IM308B
6ES5308-3UB11
 S5-135/155U IM308C
6ES5308-3UC11
6ES5308-3UC21
 S5-135/155U Onlinecable PG6xx to AS511
6ES5731-0BD20
6ES5731-0CB00
6ES5731-0CC00
6ES5731-0BF00
 S5-135/155U Power supply
6ES5951-4LB11
 S5-135/155U PS 955 24VDC 18A
6ES5955-3NC42
6ES5955-3NC41
 S5-135/155U PS955 115/230VAC 18A
6ES5955-3LC13
6ES5955-3LC14
6ES5955-3LC12
 S5-135/155U PS955 24VDC 40A
6ES5955-3NF11
 S5-135/155U PS955 24VDC 40A
6ES5955-3NF42 last edition
6ES5955-3NF41
 S5-135/155U PS955 PS 115/220VAC 18A
6ES5955-3LC33
 S5-135/155U PS955 PS 115/230VAC 18A
6ES5955-3LC41
6ES5955-3LC42 last edition
 S5-135/155U PS955 PS 24VDC 10A
6ES5955-3NA12
6ES5955-3NA11
 S5-135/155U PS955 PS 24VDC 18A
6ES5955-3NC12
6ES5955-3NC13
 S5-135/155U PS955 PS115/230VAC 40A
6ES5955-3LF44 last edition
6ES5955-3LF42
6ES5955-3LF41
 S5-135/155U Standard Frontconnector 42-PIN
6ES5497-4UB12
 S5-135/155U Standard Frontconnector 42-PIN
6ES5497-4UB31
 S5-135/155U ZG 188 (excl.PS / CPU's)
6ES5188-3UA11
6ES5188-3UA12
6ES5188-3UA21
6ES5188-3UA22
6ES5188-3UA32
6ES5188-3UA52
6ES5188-3UA31
6ES5188-3UA32
6ES5188-3UA51
6ES5188-3UA52
 S5-135/155U/H AI 466
6ES5466-4UA11
 S5-135U 16DI 24-60VAC floating
6ES5435-4UA12
6ES5435-4UA11
 S5-135U CPU920 M processor
6ES5920-3UA11
 S5-135U CPU921 S processor
6ES5921-3UA11
6ES5921-3UA12
 S5-135U Rack (excl. PS / CPU's)
6ES5135-3KA13
6ES5135-3KA31
6ES5135-3KB13
6ES5135-3KB21
6ES5135-3UA11
6ES5135-3UA21
6ES5135-3UA31
6ES5135-3UA41
6ES5135-3UA42
6ES5135-3KB12
 S5-135U-155U/H Connector IP242A/B
6ES5983-2AB11
 S5-135U-155U/H Connector IP252
6ES5983-3AA11
 S5-155H PS955 PS 24VDC 14A
6ES5955-7NC12
 S5-155U CP355
6ES5355-3UA11
 S5-155U Rack (excl. PS / CPU's)
6ES5155-3UA21
6ES5155-3UA11
 Simatic Cover
6ES5981-8MA11
 Siwarex
7MH3305-1AA
7MH3305-1AB
 SOFTwerk S5-135/155U IM cable
6ES5721-0CD20
6ES5721-0BB00
6ES5721-0BB60
6ES5721-0BC50
6ES5721-0BC00
6ES5721-0BD20
6ES5721-0CB00
6ES5721-0CB20
6ES5721-0CB60
6ES5721-0CC50
6ES5721-0BB50
6ES5721-0BF00
 WF661
6FM1661-3AA10
6FM1661-3AA00
 Y-Adapter f. CP581
6ES5714-2AS01