XYCOM XVME-404

咨詢熱線--17750626260　

在上述幾個(gè)部分中，通訊服務(wù)和程序掃描過(guò)程是PLC工作的主要部分，其工作周期稱為掃描周期。可以看出掃描周期直接影響控制信號(hào)的實(shí)時(shí)性和正確性，為了確保控制能正確實(shí)時(shí)地進(jìn)行，在每個(gè)掃描周期中，通訊任務(wù)的作業(yè)時(shí)間必須被控制在一定范圍內(nèi)。PLC運(yùn)行正常時(shí)，程序掃描周期的長(zhǎng)短與CPU的運(yùn)算速度、與I/O點(diǎn)的情況、與用戶應(yīng)用程序的長(zhǎng)短及編程情況等有關(guān)。通常用PLC執(zhí)行l KB指令所需時(shí)間來(lái)說(shuō)明其掃描速度，一般為零點(diǎn)幾ms到上百ms。值得注意的是，不同指令其執(zhí)行時(shí)間是不同的，從零點(diǎn)幾μs到上百μs不等，故選用不同指令所用的掃描時(shí)間將會(huì)不同。而對(duì)于一些需要高速處理的信號(hào)，則需要特殊的軟、硬件措施來(lái)處理。

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廈門(mén)莫格電氣自動(dòng)化有限公司
張芳（銷(xiāo)售工程師）
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SQUARE D MECHANICAL INTERLOCK KIT 9423M1
 
SQUARE D 25-189BAR, 10A, 500VAC PRESSURE SWITCH 9012 HFW-2 SER A
 
SQUARE D EK-1020-1 SERIES D2 ELECTRICAL INTERLOCK, NIB
 
SQUARE D LIGHT MODULE LOT OF 3 CLASS 9001 TYPE KM SER F
 
SQUARE D 250AMP 3POLE 1PH CIRCUIT BREAKER LAL36250
 
SQUARE D SK500G1 CLASS 9070 TRANSFORMER DISCONNECT, NNB
 
SQUARE D 3-POLE FUSEHOLDER FOR DISCONNECT SWITCH 40566-040-51
 
SQUARE D XSZCD111Y SENSOR CABLE & MORE MISC LOT OF 5
 
SQUARE D 600VAC 250A 3-POLE MOLDED CASE SWITCH KHP36000M
 
SQUARE D 30A SINGLE POLE CIRCUIT BREAKER LOT OF 3 QOB LM-9546
 
SQUARE D 100AMP CIRCUIT BREAKER FA100A
 
SQUARE D FUSIBLE HEAVY DUTY SAFETY SWITCH H361 SER. D2 *HANDLE*
 
SQUARE D LDG-6T COMBINATION HINGE AND SCREW COVER, SEALED, NIB
 
SQUARE D * SER F1 100A SAFETY SWITCH * H36AW5
 
TELEMECANIQUE LA1 DN22 CONTACT BLOCKS, LOT OF 2, NIB
 
SQUARE D 9070 SER.A CONTROL TRANSFORMER K100D1
 
AEG SQUARE D POWER BLOCK 52914-036-50 23A4
 
SQUARE D CLASS 9070 SER. A INDUSTRIAL CONTROL TRANSFORMER K200D1
 
SQUARE D 24V 1 SECOND FIXED ELECTRICAL TIMING RELAY JCK2F1V14 SER. C WITH BASE
 
SQUARE D 9421 VCF2 EMSQCSM25S LOADBREAK SWITCH, NNB
 
SQUARE D 240VAC 30A 2-POLE GENERAL DUTY SAFETY SWITCH D221N SER. E3
 
SQUARE D 600VAC 20A 2-POLE CIRCUIT BREAKER FA-36020-30
 
SQUARE D 440/480V TO 110/120V INDUSTRIAL CONTROL TRANSFORMER 9070 EC-1D9 SER. C
 
SQUARE D 400AMP 600V MOLDED CASE CIRCUIT BREAKER LA36400 SERIES 4
 
SQUARE D CLASS 8501 110/120 VAC COIL AC CONTROL RELAY DO-82 *NEW*
 
SQUARE D CLASS 9006 18MM CYLINDRICAL PROXIMITY SWITCH PJF111N *NEW*
 
SQUARE D 2-POLE 15A CIRCUIT BREAKER FAL26015
 
SQUARE D * FLOAT EF-1 9049 * 48557
 
SQUARE D 10A 24V COIL CONTROL RELAY G0 40 SER. D W/ TIME DELAY ATTACHMENT 9623
 
SQUARE D * CURRENT TRANSFORMER 750:5 600V * 74R-751
 
SQUARE D 0.075KVA 50/60Hz INDUSTRIAL CONTROL TRANSFORMER 9070TF75D1
 
SQUARE D 3-POLE 15A 600V CIRCUIT BREAKER FHL36015
 
SQUARE D QMB-362-T BRANCH SWITCH, FUSISBLE, 60 Amp, NEW
 
SQUARE D CLASS 9070 INDUSTRIAL CONTROL TRANSFORMER T50D1 NIB
 
SQUARE D 10A 2-POLE CIRCUIT BREAKER LOT OF 2 QOU LL-9308
 
SQUARE D SY/MAX RELAY OUTPUT MODULE 8030 ROM271 S30617-593-50


SQUARE D SY/MAX RELAY OUTPUT MODULE 8030 ROM271 S30617-593-50
 
SQUARE-D * MOTOR CONTROLLER SER.D 12/3R FORM C * 8538 SBA22
 
SQUARE D 600VAC 10A SELECTOR SWITCH, 9001SKS11BH1, NIB
 
SQUARE D .050 KVA 50/60HZ INDUSTRIAL CONTROL TRANSFORMER 9070 TIPO T50D1
 
SQUARE D 240V 60A SINGLE THROW FUSIBLE SAFETY SWITCH H 86352 SER. A3
 
SQUARE D 600V 15A 3 POLE CIRCUIT BREAKER, FH36015
 
SQUARE D 24VDC 3PDT-12A PLUG-IN GP RELAY SER.E 8501KUD13V53 NIB, LOT OF 2
 
SQUARE D 24VDC TIMING RELAY 9050 JCK2F300V14 SERIES B W/4 TERMINAL SOCKET
 
SQUARE-D * MICRO SWITCH NIB * 9007CO3
 
SQUARE D 240VAC 200A RAINTIGHT SINGLE THROW FUSIBLE SAFETY SWITCH H324NDS S. D4
 
SQUARE D CLASS 9999 TYPE D01 AUXILIARY CONTACT B600
 
SQUARE-D * RELAY * 8501KX12V20
 
SQUARE D SUPPLEMENTARY PROTECTOR MG24509 *NIB* LOT OF 4
 
SQUARE D QMB364W SERIES E1 3 POLE 600 VAC PANEL BOARD SWITCH
 
SQUARE-D * 240VAC 30A SAFETY SWITCH SER E2 * H321N
 
SQUARE D 480VAC 30A 3-POLE MOLDED CASE CIRCUIT BREAKER FC34030
 
SQUARE D 600VAC 225A PANELBOARD W/ BREAKERS HCM 2364-2N SER. E1
 
SQUARE D 240V 60A SINGLE THROW FUSIBLE SAFETY SWITCH H 86352 SER. A2
 
SQUARE D * CIRCUIT BREAKER 120V 240VAC 1 POLE LOT OF 5 * QOB120
 
SQUARE D 9423 M-4 DOOR CLOSING MECHANISM, NIB
 
SQUARE D 9423 TYPE M-8 VAULT HANDLE DOOR CLOSING MECHANISM, NNB
 
SQUARE-D * OVERLOAD MODULE NIB * SO4
 
SQUARE D RSD14 SER. A, MINIATURE RELAY, CONTACTS 5A 4PDT, COIL 110VDC, NIB
 
SQUARE D ON-145 OFF-175 PRESSURE SWITCH 9013 / GHG2J63 SER-C NIB