X30DH1原装进口
日期：2022-11-1西门子S7-300/400PLC只有32位的循环移位指令，和32位加CC1的循环移位指令。下面是我编的程序，MD10和MD14组成64位数据，MD10在高32位。
在I0.0的上升沿，分别将MD10和MD14循环左移1位，然后交换它们的最低位M13.0和M17.0的值，就能实现64位数据的循环左移1位。
A I 0.0
FN M 1.0
JCN _001 //不是I0.0的上升沿则跳转
L MD 10
RLD 1 //双字左移一位
T MD 10
L MD 14
RLD 1 //双字左移一位
T MD 14
A M 13.0
= M 1.1 //暂存M13.0
A M 17.0
S M 13.0 //以下程序交换M13.0和M17.0的值
AN M 17.0
R M 13.0
A M 1.1
S M 17.0
AN M 1.1
R M 17.0
_001: NOP 0
此程序已用仿真验证，下图中的修改数值是移位之前MD10和MD14的值，状态值是循环左移4位后的值。
问：西门子S7-300硬件组态中，出现版本号，如何选择？比如，组态CPU 313C-2DP时，有V2.0和V2.6两个版本，应该选择哪个呢？我只知道订货号为：6ES7 313-6CF03-0AB0，版本号不知道啊？
答：打开你的CPU盖板，在接电源线的模板附近有版本号。你用这个版本号就能很准确地对硬件进行组态。祝你成功！
问：我想先用数据采集卡采集某些数据，界面的编写采用vb,然后在vb中再将采集得到的数据传送给s7-300,请问这个能实现吗？具体怎么实现呢？
答：VB 等高级语言需要驱动才能与 PLC 通讯，一般是通过 OPC 建立连接。如果是使用 SIMATIC NET 作为 OPC 服务器来提供连接的话参见下面的论坛讨论。
西门子也提供了 VC、 VB 与 OPC 服务器通讯的样例程序。
问：西门子S7-300的模拟量输入模块，有如下说明：8通道组中8点输入，请问，是什么意思啊？
答：8通道组中8点输入，各个通道输入信号类型可以随意设置，主要模块支持，如果是“4通道组中8点输入”则是每同组的输入点输入信号必需一致，都是4～20mA，或都是0～10V。
问：新建一个程序，在硬件组态中想把DO模块的输出首地址改改，但 系统默认 那个选项是灰色的，没法勾选掉，这是什么回事啊
答：经试验发现System Default复选框是灰色的可能有两方面的问题：
1.你所打开的程序文件的属性被设置为只读了。将所要打开文件的只读属性去掉（右键点击程序所在的文件夹-选择属性-将只读选择去掉-确定），然后再从编程软件中打开，System Default复选框就正常了，你就可以自由配置了。
2.软件安装过程中出现了异常而导致的。这种情况只能重新安装编程软件了。
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Cisco Systems 12000/16-DC-UP | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems FLASR1-BB-16K | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems L-FLASR1-BB-16K | incl 19% VAT | 2 years Cybertrading warranty
Cisco WS-C4506-E - X45-SUP6L-E, 4x X4648-RJ45V+E, 2x 1000AC
*** we buy Cisco WS-C3750X-12S-E **** (Brand New) 3750X (MO)
*** we buy Cisco WS-C3750X-12S-E **** (Brand New) 3750X
Cisco 15454-10G-XR Fiber Module OC-192/STM-64 1YearWarranty 2+Available
Cisco A9K-MPA-4X10GE 10GE Modular Port Adapter (MPA) for ASR 9922/ 9010 / 9006
CISCO3925E/K9 Cisco 3925 Router with 4 onboard GE w/ EM-4BRI-NT/TE Module
CISCO3945/K9 Cisco 3945 with 3 onboard GE IP Base w/ VIC2-2BRI-NT/TE Module
NEW CISCO SPA-10X1GE-V2 with 1 Year Warranty and Fast Shipping
Cisco UCSB-B200-M3 192GB, Intel 2.60 GHz E5-2630 v2/80W, 600GB 6Gb SAS 10K RPM
#NEW# Cisco WS-C3650-48TD-E 3650 Series 48 Port Switch #FAST SHIPMENT#
Cisco RFGW-1-D RF Gateway 1 Universal Edge QAM (U-EQAM) w/ Data License DC Pow
Cisco GSR6/120-DC 2 x DC PEM 2x CSC 2X ALRM 3 X SFC, BLOWER, COVER
*New Sealed* CISCO3925E/K9 3900 4-Port Gigabit Wireless Router Fast Shipping
Cisco WS-C3750X-24S-S 24 x SFP Ports GIGABIT Stackable Switch *NEW*
NEW IN BOX CISCO VS-S720-10G-3C SUPERVISOR ENGINE 720 *SHIP FAST*
**New** CISCO WS-C3850-48UW-S Cisco Catalyst 3850 48 Port UPOE Switch
CISCO A9K-4T-E 4-Port 10GE Extended Line Card
BRAND NEW IN BOX Cisco WS-C4948-10GE-S Catalyst Ethernet Switch ! SHIP FAST !
NEW IN BOX Cisco WS-X4724-SFP-E Catalyst 4500E Series 24-Port GE SFP !SHIP FAST
L-FLA1-1X-5-10G= Cisco Upgrade from 5 Gbps to 10Gbps License - license
~GOOD CONDITION~ CISCO UBR-MC3GX60V Control Processor ~FAST DELIVERY~
Cisco Nexus 3524P Switch N3K-C3524P-10G New in box
*New Sealed* Cisco ISR4431-SEC/K9 Cisco Integrated Services Router 4000 Family
*NEW* CISCO ISR4431-SEC/K9 Cisco ISR4431 Router with Security Bundle IN STOCK!
*NEW Sealed* CISCO WS-C3850-24U-E 24 Port Switch w/ C3850-NM-2-10G Module
! BRAND NEW IN BOX ! CISCO VS-S720-10G-3C Supervisor 720 !! SHIP FAST !!
L-ASA-SSL-250 Cisco ASA 5500 Series SSL VPN license - license
NEW IN BOX CISCO WS-C3650-48PQ-S 48 POE+ GE, 4x10 90DAYS WARRANTY **SHIP FAST**
Cisco Systems FLASR1CUBEE100P
New CISCO WS-C3750E-48PD-S | incl 19% VAT | 2 years Cybertrading warranty
~NEW SEALED~ CISCO WS-X4712-SFP+E 4500-E Series Line Card ~FAST DELIVERY~
~NEW SEALED~ CISCO WS-X4724-SFP-E 24 Port SFP ~FAST DELIVERY~
NEW IN BOX CISCO WS-C3650-48PQ-S 48 POE+ GE, 4x10G, 640W, IP Base Switch
~GOOD CONDITION~ CISCO WS-X6904-40G-2T 4 Port Ethernet Module ~FAST DELIVERY~
#NEW# Cisco VS-S720-10G-3C Supervisor Engine #FAST SHIPMENT#
New Cisco Systems WS-C3650-48PQ-L | incl 19% VAT | 2 years Cybertrading warranty
Cisco 1-Port Channelized OC12 DS0 SPA SPA-1XCHOC12/DS0 45 Days WARRANTY
New Cisco Systems WS-C3750E-48PD-S incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems N2K-C2248TF incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems SCE8000-SIP | incl 19% VAT | 2 years Cybertrading warranty
10 Pcs. Cisco WS-C4948-S Catalyst standard multilayer Switch w/ DUAL AC Power
*New In Box* Cisco NIM-4FXS Network Module *Fast Ship*
NEW Cisco WS-C3650-48PD-S Catalyst 3650-48P Layer 3 Switch 3650 48 Port PoE 2x10
New Cisco Systems N5596-EL2-SSK9 | incl 19% VAT | 2 years Cybertrading warranty
*NEW SEALED* CISCO NIM-4FXS 4-Port Network Interface Module
3rd Pty CON-SNTP-EDU1CT55 24X7X4 for Cisco 5508 Series Wireless Controller fo
Cisco Catalyst 3750X-24P-S - Switch - verwaltet
NEW IN BOX CISCO WS-X4724-SFP-E Catalyst 4500 E-Series 24-Port GE **SHIP FAST**
Cisco Systems N4K-4001I-XPX
CISCO MCU4501 CTI-4501-MCU-K9 TelePresence 6MthWtyTaxInv
Cisco Systems WS-C3850-48T-S incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems WS-C3850-24U-S incl 19% VAT // 2 years IT4Trade warranty
3rd Party CON-SNTP-7613SRSX / 24X7X4 for Cisco 7613S Chassis,, 1 year
*** NEW Cisco WS-C3850-12S-E CATALYST 3850 12PT GE SFP IP SVC
New Cisco Systems N1K-VLCPU-16 | incl 19% VAT | 2 years Cybertrading warranty
*New Sealed* Cisco WS-C3850-12X48U-L 48 10/100/1000 UPOE Ethernet ports Switch
Cisco Systems L-FLASR1CUBEE100P
NEW SEALED Cisco WS-X4724-SFP-E= Managed L3 Switch 48 PoE+ 1YearWaranty 2+Avlble
Cisco Systems AS535-8E1-210-AC-V
*NEW Factory Sealed* CISCO WS-X45-SUP7-E Supervisor Engine SUP7 *SHIP FAST*
*Brand NEW* CISCO SG500X-48MP-K9 48 10/100/1000 PoE+ ports Switch
Cisco WS-X6708-10G-3CXL C6K 8 port 10 Gigabit Ethernet module with DFC3CX
NEW Factory Sealed Cisco WS-C3850-48U-L 48 10/100/1000 Ethernet UPOE port Switch
Cisco DCM-GBE-MK1 Expansion Module 1YearWarranty 2+Available
Cisco 7300-4OC3POS-SMI Network Module 1YearWarranty 2+Available
Cisco ASA5520-UC-BUN-K9 Secr Appliance 1YearWarranty 2+Available
NEW WS-X6748-SFP Cisco Catalyst 6500 48-port GigEthernet Module
CISCO3845-AA/K9 Cisco 3845 Optimization Bundle Router w/ DUAL AC Power Supply
Cisco WS-C6504-E Dual P/S 2x VS-S720-10G-3C 1x WS-X6748-GE-TX 1x WS-X6708-10G-3C
#NEW# Cisco WS-X4724-SFP-E 4500 Series 24 Port GE #FAST SHIPMENT#
New Sealed Cisco WS-C3850-48UW-S 2015 Catalyst 3850 Switch 48-Port GE UPoE 1100W
CISCO - WS-X6848-TX-2T - C6k 48 10/100/1000 GE fabric enabled, RJ45 DFC4
CISCO - WS-X6824-SFP-2T - Catalyst 6500 24-pt GigE fabric-enabled w/ DFC4
NEW Sealed Cisco WS-C3850-12X48U-L 48 10/100/1000 UPOE Ethernet ports w/ 1100W
New CISCO L-FLASR1CUBEE100P | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ASA5525-K9 incl 19% VAT // 2 years IT4Trade warranty
CISCO C2951-VSEC-PSRE/K9 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems WS-C3850-48U-S | incl 19% VAT | 2 years Cybertrading warranty
NEW Sealed Cisco NIM-4FXO 4-port Network Interface Module - FXO (Universal)
*** NEW Cisco WS-C3750X-24S-E 24 GE SFP 10/100/1000 ETHERNET PORTS
New CISCO WS-C3560E-48PD-S | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems WS-C3750X-12S-E | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems SPA-2XOC12-POS
Cisco Systems ASR1000-RP1
*Brand NEW* CISCO WS-C3850-48T-S 48 Port Switch w/ 350WAC power + C3850-NM-4-10G
New Cisco WS-C3850-12X48U-L Catalyst Managed L3 Switch 1YearWarranty 2+Available
New CISCO SPA-1XCHSTM1/OC3 | incl 19% VAT | 2 years Cybertrading warranty
New Cisco Systems WS-C4948-S | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ASA5580-40-BUN-K9
CISCO WS-C3750X-48P-E | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems ME3800X-A
Cisco Systems L-ME3800X-A
Cisco CISCO2911-HSEC+/K9 2911 Integrated Service Router - 3 Ports - 7 Slots
#NEW# Cisco WS-C3850-12X48U-L Catalyst Managed L3 Switch #FAST SHIPMENT#
HP C7000 W/ 16x BL460C G6 BLADE 2x CISCO 3020 2x E5540 48GB 2X 600GB 10K RAILS
HP C7000 W/ 16x BL460C G6 BLADE 2x CISCO 3020 2x L5520 48GB 2X 600GB 10K RAILS
New Cisco Systems N4K-4001I-XPX | incl 19% VAT | 2 years Cybertrading warranty
*New Sealed*Cisco WS-X4712-SFP+E 4500 E-Series 12-Port 10GbE (SFP+),QtyAvailable
Cisco Systems A901-12C-FT-D | incl 19% VAT | 2 years Cybertrading warranty
New CISCO L-N5596-EL2-SSK9 | incl 19% VAT | 2 years Cybertrading warranty
CISCO - WS-C4948-10GE= - Catalyst 4948, optnl sw, 48*10/100/1000+2*10GE(X2)
Cisco Systems CISCO7576/8 | incl 19% VAT | 2 years Cybertrading warranty
Cisco ASA5580-40-BUN-K9 VPN Premium license 12GB RAM 4xCPU 20xSEC CONTEXT
New Cisco Systems ME3800X-A | incl 19% VAT | 2 years Cybertrading warranty
Cisco Systems C2951-4G-V-SEC/K9
CISCO 7604 w/ 2x RSP720-3C-GE, 2x PWR-2700-AC/4 CISCO7604 - 3YR Warranty
CISCO 7604 w/ 2x RSP720-3C-GE, 2x PWR-2700-DC/4 CISCO7604 - 3YR Warranty
CISCO 7606 w/ 2x RSP720-3C-GE, 2x PWR-2700-AC CISCO7606 - 3YR Warranty
CISCO 7606 w/ 2x RSP720-3C-GE, 2x PWR-2700-DC CISCO7606 - 3YR Warranty
CISCO UBR7246VXR w/ UBR7200-NPE-G2, 4x MC28U, DUAL AC 2GB/256F - 3YR Warranty
Cisco Catalyst 2 Units WS-C3560X-48T-E New in box Free shipping
Cisco UCSC-C240-M3S 8x 600GB 6Gb SAS, 2x Xeon E5-2660/95W, 128GB (16GB) DDR3
NEW Cisco WS-C3850-12S-E Stackable 12 SFP Etht ports, with 350WAC IP Services
*NEW SEALED FAST SHIP* CISCO ASA5525-IPS-K9 (2YearsWnty) ASA5525
New Sealed Cisco CISCO7201 Router Base System Chassis 1GB Memory KAJ
Cisco WS-SVC-WiSM2-1-K9 Wireless Services Module WiSM2 100 Access Points
Cisco MEM-694-24GB (Refurbished) WAVE 694 24GB memory upgrade
NEW Cisco WS-C3750X-24S-E 10/100/1000 24 Port GE SFP IP Services
New Cisco WS-C4948E-S with 1Year Warranty Catalyst 4948E Ethernet Switch
20qty 1U Server 2x Intel Xeon E5620 2.4Ghz QC 48GB Cisco UCS C200 M2 FREE SHIPP
Cisco N7K-C7010 Chassis c/w 2x N7K-AC-7.5KW-US, Fan Tray S & F
New Cisco Systems WS-C3750X-12S-S incl 19% VAT // 2 years IT4Trade warranty
*Brand NEW* CISCO CTS-SX20-PHD4X-K9 TelePresence SX20 Quick Set
Cisco WS-X6148E-GE-45AT New Sealed Ethernet module 48ports 10/100/1000
~NEW SEALED~ Cisco WS-C3850-12XS-S Switch ~FAST DELIVERY~
NEW IN BOX CISCO WS-C3650-48PD-E 48 Port PoE 2x10G Uplink IP Service *SHIP FAST*
NEW Cisco ASA5525-FPWR-K9 ASA 5525-X with FirePOWER Services, 8GE data, AC,
New CISCO N3K-C3048TP-1GE Nexus 3048TP-1GE 1RU 48 10/100/1000 Mbps,4 10Gbps port
*New Sealed*Cisco WS-C3750V2-24FS-S Network Device,Fast Shipping,Qty Avaialble
Cisco ME-3600X-24FS-M Switch 24 Ports 1YearWarranty 2+Available
Cisco Systems A901-12C-FT-D | incl 19% VAT | 2 years Cybertrading warranty
Cisco UCSC-C240-M3S dual P/S 16x 600GB 6Gb SAS, 2x Xeon E5-2630Lv2, 64GB (8GB)
Cisco UCSB-B200-M3 40GB, 2x Intel E5-2643/130W, No HDD
*Brand NEW* CISCO WS-C3850-12S-E 12 SFP Ethernet ports, w/ C3850-NM-2-10G Module
Cisco Systems 15454-DS3EC1-48
Cisco Systems CISCO7576/8 | incl 19% VAT | 2 years Cybertrading warranty
NEW Cisco WS-C4948-S Cisco Catalyst 4948, IP Base software image Switch
CISCO C3945-CME-SRST/K9 Cisco3945 Voice Bundle w/PVDM3-64 Module C3900-SPE150/K9
New Cisco Systems N5596-EL2-SSK9 | incl 19% VAT | 2 years Cybertrading warranty
BRAND NEW IN BOX Cisco Catalyst WS-C3650-48PD-E Layer 3 48 Ports PoE+ Switch
New Cisco Systems ASR1000-SIP40 | incl 19% VAT | 2 years Cybertrading warranty
Cisco Catalyst WS-C3850-48T-E Ethernet Switch
Cisco UCSB-F-FIO-785M Fusion-io ioDrive2 785GB 1YearWarranty 2+Available
*** NEW WS-C3650-48TS-E 48 Port 4x1G Uplink 250WAC IP Service
Cisco 15454-10E-L1-77.4 ONS 10-GBPS ENHANCED TRANSPONDER 4
3rd Party CON-SNT-9S7C10GR / 8X5XNBD for Cisco 7609S Chassis, 1 year
CISCO CATALYST 3650 48 PORT DATA 4X1G UPLINK IP BASE IN
3rd Party CON-SNTP-6S7X10GP / 24X7X4 for Cisco 7606S Chassis, 1 year
Cisco Systems PVDM4-128 | incl 19% VAT | 2 years Cybertrading warranty
NEW IN BOX CISCO CATALYST WS-C3850-12XS-S FIBER SWITCH IP BASE 350WAC*SHIP FAST*
New CISCO Cisco3845-SAA/K9 | incl 19% VAT | 2 years Cybertrading warranty
NEW Sealed Cisco SG500X-48MP-K9 48 10/100/1000 PoE+ ports with 740W power budget
Cisco ASR1002 Router, ASR1000-ESP5 Module, 2x ASR1002-PWR-AC, Rackmount Kit
NEW Cisco WS-C3650-48FS-S Catalyst 3650-48F Layer 3 Switch 48 Port Full PoE 4x1G
Cisco Systems WS-C3560E-12D-E incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems ASA5520-UC-BUN-K9 incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems WS-C3750G-24TS-E1U incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems WS-C3750X-48PF-L incl 19% VAT // 2 years IT4Trade warranty
New Cisco Systems WS-C3750G-24PS-E incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems PVDM3-16U192 incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems PVDM3-32U192 incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems PVDM3-64U192 incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems PVDM3-192 incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems VS-S720-10G-3CXL incl 19% VAT // 2 years IT4Trade warranty
Cisco Systems WS-C4507RES6L+96V+ incl 19% VAT // 2 years IT4Trade warranty
CISCO OSM-16OC3-POS-SI 16-port OC-3/STM-1 For 7600 6500
WS-C3750X-48T-E Cisco "NEW" 2 Years Warranty
NEW Sealed Cisco C1-C4500X-16SFP+ One Catalyst 4500-X 16 Port 10G IP Base Switch
Cisco WS-IPSEC-3 Cisco Catalyst 6500 Series VPN Services Port Adapter
Cisco UCSB-B200-M3 256GB, 2x Intel E5-2630 v2, 2x 600GB 6Gb SAS