Serializing an entire data model can require a lot of code – from simple scalar fields (bool, int, float), to containers (vector, list, hash table, etc. 00 Option module slots DL05 / DL06 PLCs tDL5-4 1-800-633-0405 For the latest prices, please check AutomationDirect. Direct. Port t 2 (RS232C/RS422/RS485) can be used to connect to a D2-HPP, DirectSOFT, operator interface, MODBUS master/slave, NET master/slave or ASCII in/out. For all DL05, DL06, DL105, DL205 and D3-350 CPUs. Title. Question: Is there a way to change the clock & calendar in the D2-250 with a D2-HPP? Answer. cameraIdx should start from 0. . Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-10 1-00-33-0405 For the latest prices, please check AutomationDirect. followed by -TR, may be followed by S or S-1. 00 2600 300 Power Consumed Device 5V(mA) 24V Auxiliary CPUs D2-262 336 0 DC Input Modules D2-08ND3 50 0 D2-16ND3-2 100 0 D2-32ND3 25 0 D2-32ND3-2 25 0 AC Input Modules D2-08NA-1 50 0 Use this cross-reference table if you're looking for the equivalent PLC Direct parts for your "old" GE or TI/Siemens PLC system. g. com. The handheld programmer can be used to create, modify and debug your application program. com. Yes, but it must have V1. distance (in units of input coordinates) of a vertex to other segments to be removed. This manual is a reference manual for the D2--HPP Handheld programmer, not a tutorial on the DL105/DL205 instruction set or system operations. . hpp > Conformance. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-10 1-00-33-0405 For the latest prices, please check AutomationDirect. D2-04TRS D2-08TR D2-12TR ZL followed by -TSD8 followed by -24 or -120. 00 PC-DS100 Free PC-R60-U (upgrade) $291. . g. Rangelike (linestring, ring) Returns boost::size (geometry) Other geometries. The manual is available free on our Web site, or it can be purchased separately. Power Consumed Device 5V(mA) 24V AuxiliaryHandheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-10 1-00-33-0405 For the latest prices, please check AutomationDirect. D2-04TRS D2-08TR D2-12TR ZL followed by -TSD8 followed by -24 or -120. . pdf Datasheet Koyo D2-HPP. ZIP. ZL-TSD120 ZL-TSD824 ZL followed by -RFU followed by 20 or 40. hpp #include "B. The convert algorithm converts one geometry, e. directlogic time-delay spare fuse, 4a. (D2–HPP), the same programmer is used with the DL06 and DL205 families. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-12 1-00-33-0405 For the latest prices, please check AutomationDirect. T: Output translation vector between the coordinate systems of the cameras. 9slot rack with ac p/s d2-ctrint. ]T, covar will be a square matrix of the same size as the total number of elements in each input vector. . d2-hpp-u integrated circuits from automation direct 2-year warranty - directlogic dl205 handheld programmer upgrade, upgrades existing d2-hpp handheld. Power Consumed Device 5V(mA) 24V Auxiliary Operator Interface DV-1000 150 C-more Micro-Graphic 210 0 tDL2-24 DL205 PLCs 1-800-633-0405 For the latest prices, please check AutomationDirect. This version of Internet Explorer is either no longer supported by Microsoft , or is obsolete and some features of our store may no longer be supported. cpp file, which must include both header files, you can define both conversion_method ()s, since both. Please• D2- HPP Handheld Programmer (comes with programming cable), and the Handheld Programmer Manual. D2-HPP $590. Or Negative Differential ORND The Or Negative Differential instruction logically from IE 4S at University of Nevada, RenoTodos los PLCs DL06 tienen un puerto de programación incorporado para el uso con el programador portátil (D2-HPP), el mismo programador usado con el DL05, DL105 y las familias DL205. E 3-3 Chapter CPU Specications and Operation CPU Specifications Specifications Feature DL05 Total Program memory (words) 6K Ladder memory (words) 2048 Total V-memory (words) 4096 User V-memory (words) 3968 Non-volatile V-Memory (words) 128 Contact execution (boolean) 2. Each. 0 o mejor puede programar el. hpp: 744] DPU model size = 768x768; root@project2022:~/ efficientdet_d2 # So it looks like I miss de "uridecodebin" plugin. void cv. Press these Keystrokes. ZIP. For the complete listing, please see the Compatibility Table in the Do-More H2-DM-M User Manual. or Best Offer. hpp > Or #include < boost / geometry / io / wkt / read. The D2-HPP supports the DL130, DL230, and DL240 PLC devices. 2. The following examples below demonstrate how to search and find different program items. Use . Power Consumed Device 5V(mA) 24V Auxiliary Operator Interface C-more Micro-D2-HPP; DV-1000; D2-RMSM; D2-RSSS; D2-EM/CM. hpp","path":"src/vai_library/xnnpp. Download ( pdf, 2. Power Consumed Device 5V (mA) 24V (mA) Aux. It differs from the above function only in what argument(s) it accepts. avi; I1022 18: 56: 54. The handheld programmer can be used to create, modify and debug your application program. Choosing the power supply is prob - ably the most important considerationHandheld programmer. Handheld programmer. Información de configuración de la CPU D2-230 and D2-240 use the D2-BAT; D2-250(-1), D2-260, and D2-262 use the D2-BAT-1. LED Status Indicators (continued) LNK/ACT D2-12TR Programmer D2-HPP No D2-08CDR Operator InterfaceDV-1000 No. Links to reduce . } B. The handheld programmer can be used to create, modify and debug your application program. Images that are used should be named by "cameraIdx-timestamp. 0 DISEÑO DEL TABLERO DE MADERA CARACTERISTICAS DE MADERA ESTRUCTURAL Clasificación por grupo estructural de especies estudiadas por el Padt-Refort de la Junta del Acuerdo de Cartagena GRUPO A. 00 PC-DS100 Free PC-R60-U (upgrade) $291. hpp. $147. This version of Internet Explorer is either no longer supported by Microsoft , or is obsolete and some features of our store may no longer be supported. ZL-RFU20 P308TRS followed by -TR, may be followed by S or S-1. Chapter 1: Getting Started. Upgrade chip to allow existing DL205 Handheld Programmers with: Firmware V1. If you use other instructions, you can only write data to RAM. Handheld Programmers | Lập trình cầm tay | Handheld Programmers Koyo. ZIP. The D2-HPP enables the operator to change many PLC system settings. If your application requires a lot of relay . 07/28/2021 07/28/2021. Connect to DirectSOFT32, D2"HPP, DV1000 or DirectNet master? 8 data bits, one start, one stop? Asynchronous, Half"duplex, DTE? Odd parity. 4K baud. com. (This means it’s okay if a file gets included twice. 00 2600 300 D2-09BDC2-1 $359. Product Description. DirectSOFT or from the D2-HPP Handheld Programmer. z-08b. 00. D1. Press these Keystrokes. This information can later be queried by other code portions, possibly written by a different author, using the supplied primitives describe_enumerators, describe_bases, and. J - H2-DM-M Cater 2 Do-more PLC Hardare vervie Communications The Do-more H2 Series PLC supports many communication protocols. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-12 1-00-33-0405 For the latest prices, please check AutomationDirect. hpp > Or #include < boost / geometry / algorithms / for_each. . D2-FUSE-1 Terminal Type (Included) Removable: D0-ACC-4 Base Power Required (5V) 250mA Max. Multiple model numbers may indicate different products, different components within the products or both. D2-HPP $590. Geometry support more text. That is not done here because Boost. 800-575-5562. com. One would like templates that carry most of the burden. handheld programmer. Retired 08/2023. 1-800-257-7756Distemper, Hepatitis, Parainfluenza, and Parvovirus (animal vaccine) DHPP. Title. the D2-240 CPU as an example. D2-HPP. FAQ ID: 612. output collection, either a multi-geometry, or a std::vector<Geometry> / std::deque<Geometry> etc. The FA-15HD adapter can NOT be used with the DV-1000 or the D2-HPP. Parameter Default Description typename Point point type bool ClockWiseThe D2- HPP Handheld Programmer Manual provides the Handheld keystrokes required to perform all of these operations. When you write data into the flash ROM, the same data is written into the RAM too. A model of the specified concept which might be inside or on the border of the second geometry. Port 2 can be used to connect to a D2-HPP, DirectSOFT, operator interface, Modbus master/slave, or a DirectNET master/slave. 74 or less c++0x works fine, 1. com. DirectLOGIC DL205 handheld programmer upgrade, upgrades existing D2-HPP handheld programmers with firmware v1. Distance const &. H 3-3 Chapter 3 CPU Specications and Operation CPU Specifications Specifications Feature DL06 Total Program memory (words) 14. ZL-TSD120 F2-UNICON ZL followed by -RFU followed by 20 or 40. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-12 1-00-33-0405 For the latest prices, please check AutomationDirect. The manuals for those products provide step-by-step procedures for accessing the AUX Functions. }; Include guards make includes “idempotent”. or Best Offer. Boost. com. AC or DC relay output modules. com. power requirements. SPECS TECH Q & A APP STORIES DOWNLOADS COMPLIANCE INFO D2-HPP-U Specifications D2-HPP-U Technical Questions Please login to ask a product question. hpp > Conformance. Description. comd2 04b d2-08na-1 f2-04ad-2l d2-hpp-u d2 04bdc-1 d2-08na-2 f2-08ad-1 d2-rmsm d2 04bdc-2 d2-16na f2-08ad-2 d2-rsss d2 06b d2-04td1 f2-02da-1 d2-dcm d2 06bdc-1 d2-08td1 f2-02da-2 h2 serio d2 06bdc-2 d2-16td1-2 f2-4ad2da h2 ebc d2 09b d2-16td2-2 f2-04rtd h2 ecom d2 09bdc-1 d2-32td1 f2-04thm f2 devnets. 00. D2: Input/output lens distortion coefficients for the second camera. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-12 1-00-33-0405 For the latest prices, please check AutomationDirect. Collection of geometries (e. Again, check with Automation Direct to see if the D3-HPP or the D2-HPP will work. SOFT. . d2-06b. D2-HPP 200mA none DV-1000 150mA none EA1-S3ML 210mA none EA1-S3MLW 210mA none DL06 Base Unit Power Required Part Number 5 VDC (mA) 24 VDC (mA) D0-06AA 800mA none D0-06AR 900mA none D0-06DA 800mA none D0-06DD1 600mA 280mA, note 1 D0-06DD2 600mA none D0-06DR 950mA none D0-06DD1-D 600mA 280mA, note 1Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-10 1-00-33-0405 For the latest prices, please check AutomationDirect. . com. • Basic style • Basic programming approach • Learn iteratively. Product Specs Condition: Used: An item that has been used previously. D2--DSCBL D2-HPP-U - DirectLOGIC DL205 handheld programmer upgrade, upgrades existing D2-HPP handheld programmers with firmware v1. For use with all DL05, DL06, DL105, DL205 and D3-350 CPUs. hpp"class D2 : public B {. ZL-RFU20 P308TRS followed by -TR, may be followed by S or S-1. 00 DIN rail mounted terminal blocks See the Connection Systems section for over 200 available options. The output geometry, either a multi_point, multi_polygon, multi_linestring, or a. }; D2. hpp #include "B. . programador portátil (D2-HPP), el mismo programador usado con el DL05, DL105 y las familias DL205. Firstly, gather all the necessary information and documentation required for programming the handheld programmer - koyoele. Handheld programmer. In fact, fastAtan2 and phase are used so that the computed angle is measured in degrees and covers the full range 0. #include < boost / geometry. Geometry support more text. . SPONSORED. provides an overview of the Handheld Programmer and provides general specifications. 00 2600 None. Instructions are on the form. . D2-260 and D2-262 support up to 1280 local I/O points with up to four expansion bases. Forgot your password? Confirm Email. The DL105 and DL205 User Manuals may occasionally be referenced by thisD2-RSSS 150 0 Programming Devices D2-HPP 200 0 *requires external 5VDC for outputs N ote1: Ad ani l20m pr u . com. com. Connect and share knowledge within a single location that is structured and easy to search. It computes the intrinsic parameters for two cameras and the extrinsic parameters between two cameras. FAQ Subcategory: None. It is intended for new user to become familiar with using the D2--HPP features and functions. followed by -TR, may be followed by S or S-1. — Introduction — Conventions Used — DL105 Micro PLC Components — Programming Methods — I/O Selection Quick ChartHandheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL3 PLCs tDL3-12 1--33-4 For the latest prices, please check AutomationDirect. D2-HPP DV-1000 D4-HPP-1 CLICK PLC Hardware User Manual, 6th Edition, Rev. com. D2: Input distortion. To select Bit Status Monitor mode To select Status type and enter reference Press CLR to exit Status function STAT 0 NEXT NEXT A ENT ENT SHFT STAT 2 C 0 A *MONITOR SELECT 16P STATUS ? 16P STATUS BIT REF C0 0 7654321076543210 C10 C_ Bit Status for a Range of bitsWe have a licensee in China that builds some of our equipment for the Chinese market place. Here is the caller graph for this function: delta () Definition at line of file americanpayoffathit. D2-12TR Programmer D2-HPP No D2-08CDR Operator InterfaceDV-1000 No. . The version with one parameter is additional and not described in the OGC standardD2-HPP 150 200 0 0 E Maximum Current Required 1730 80 F Remaining Current Available 2600-1520=1080 300-80=220 Power Supply Specifications Specification AC Powered Bases 24 VDC Powered Bases 125 VDC Powered Bases Part Numbers D2-03B-1, D2-04B-1, D2-06B-1, D2-09B-1 D2-03BDC1-1, D2-04BDC1-1,Press these Keystrokes D2–HPP Display Results I AUX 1 B ENT 3. What’s it got? • 10 inputs and 8 outputs • 2K program memory • 384 words data memory • 110/220 VAC or 24 VDC powered models • Built-in 24 VDC auxiliary power supply for field devices included with AC powered modelsD2-HPP 200mA none DV-1000 150mA none C-more Micro-Graphic 210mA none DL05/06 Power Consumed by Option Modules Part Number 5 VDC (mA) 24 VDC (mA) D0-07CDR 130mA none D0-08CDD1 100mA none D0-08TR 280mA none D0-10ND3 35mA none D0-10ND3F 35mA none D0-10TD1 150mA none D0-10TD2 150mA none D0-16ND3 35mA noneAmericanPayoffAtHit. D2-HPP 200mA none DV-1000 150mA none C-more Micro-Graphic 210mA none DL05/06 Power Consumed by Option Modules Part Number 5 VDC (mA) 24 VDC (mA) D0-07CDR 130mA no e D0-08CDD1 100mA none D0-08TR 280mA none D0-10ND3 35mA none D0-10ND3F 35mA no e D0-10TD1 150mA none D0-1 T 2 150mA none D0-16ND3 35mA noneHandheld programmer. This programmer is one of the parts from the DirectLogic 105 series of products. The EZ-to-use screens and pull-down menus provide all tools you will need to select the panel type, configure the PLC communications, create text messages, etc. One would like templates that carry most of the burden. The D2-INST-M Installation and PLC I/O User Manual covers information about DL205 I/O modules, power bud-geting, and installation and wiring. hpp"#include "D2. }; main. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-12 1-00-33-0405 For the latest prices, please check AutomationDirect. FAQ Subcategory: None. g. 0 us Typical. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL3 PLCs tDL3-12 1--33-4 For the latest prices, please check AutomationDirect. For replacement cable, use part no. The D2- HPP Handheld Programmer Manual provides the Handheld keystrokes required to perform all of these operations. s-20p. com. The DL105 and DL205 User Manuals may occasionally be referenced by this manual. The information provided in the AutomationDirect knowledge base is provided "as is" without. 82 or later to program DL05, DL06 and DL105 units. D2-RSSS 150 0 Programming Devices D2-HPP 200 0 *requires external 5VDC for outputs Note 1: Add an additional 20 mA per output loop. }; D2. 76 Show EEPROM Type (CPU and HPP) HP AUX 8* — Password Operations 81 Modify Password * 82 Unlock CPU * 83 Lock CPU * AUX Function and Description DL06 AUX. Each. Multiple model numbers may indicate different products, different components within the products or both. a RING. Convenient usage of for_each_point, rounding all points of a geometryPress these Keystrokes D2–HPP Display Results Begin the Bit Status Monitor mode. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-10 1-00-33-0405 For the latest prices, please check AutomationDirect. Page 21 D2 Drive User Guide v1. 00 PC-DS100 Free PC-R60-U (upgrade) $291. . Communications Data Comm Unit (RS232C), 330/340 CPUs only Data Comm Unit (RS422), 330/340 CPUs only Data. hpp > Conformance. ZIP. numerical type (int, double, ttmath,. Closed geometries. Press these Keystrokes (Add X7) Equivalent Ladder Logic Mnemonic Example Program ON 2. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-12 1-00-33-0405 For the latest prices, please check AutomationDirect. geometry2. Entering Programs. A Appendix E PL Memory If you use the instructions except for the MOV instruction to write data into the non-volatile V-memory area, you only update the data in RAM. cpp file, which must include both header files, you can define both conversion_method ()s, since both. This document also may not show all models included in the listing. This document also may not show all models included in the listing. The baud rate is fixed at 9600 baud. Defines a neutral point class, fulfilling the Point Concept. D2-HPP 200 0 *requires external 5VDC for outputs Note 1: Add an additional 20 mA per output loop. handheld programmer. Multiple model numbers may indicate different products, different components within the products or both. ZIP. M – C0-USER-M 4–5 Chapter 4: PLC Communications. For use with D2-HPP handheld programmer. Handheld programmer. com. D2–HPP Example Display. . Example. com. 5. . }; D2. 2334: RFQ: D2-INST-M: programmable controllers#include < boost / geometry. $450. power requirements. The D2–HPP is commonly used for program changes and creating simple RLL programs. Please consider the Productivity, BRX, or CLICK Series of PLC systems as a replacement. This catalog does. d2-06b. Rev. R: Output rotation matrix between the 1st and the 2nd camera coordinate systems. As a consequence, modifiers. programmer (D2--HPP), the same programmer used with the DL205 family. . . This item was last updated on 2021-01-25 Document ID: 1022. ZIP. D2-HPP $497. The strategy which will be used for is_simple calculations. 00 2600 None D2-06B-1 $268. output geometry, simplified version of the input geometry. 114 info@gemmecotti. Need help selecting a PLC family?The D2--HPP (Handheld Portable P rog am e) i sn lpu t f usewiththeDL105orDL205 PLC products. . ) MOV D2-HPP DirectSOFT MOV D2-HPP DirectSOFT There is no way to read data from the Flash ROM directly. Port 2 has a range of speeds from 300 baud to 38. The D2-250–1, D2-260 and D2-262 provide a built–in master for remote I/O networks. programmer (D2--HPP). T: Output translation vector between the coordinate systems of the cameras. cpp. hpp // Boost. Geometry is header only, so including headerfiles is enough. . The baud rate is fixed at 9600 baud for port 1. No module has to be placed in. com. Geometry This point class is used occasionally within the library, where a temporary point class is necessary. 00 Option module slots DL05 / DL06 PLCs tDL5-4 1-800-633-0405 For the latest prices, please check AutomationDirect. z-ctif. Purpose of Section This section will demonstrate how to use the Handheld programmer for mnemonic programming. Returns true if the geometry is valid (in the OGC sense); furthermore, the following geometries are considered valid: multi-geometries with no elements, linear geometries containing spikes, areal geometries with duplicate (consecutive) points. com. Returns 2^d, where d is the dimension of the box. Join Product iQ. 1-4 DL05 Micro PLC User Manual, 6th Edition, Rev. . hpp>. $1,200. FAQ ID: 552. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL305 PLCs tDL3-10 1-00-33-0405 For the latest prices, please check AutomationDirect. 00 2600 300 Power Consumed Device 5V(mA) 24V Auxiliary CPUs D2-262 336 0 DC Input Modules D2-08ND3 50 0. D2-CTRINT F2-CP128 D2-EM D2-CM Programming Software The Do-more H2 Series PLC can only be programmed by Do-more Designer. Q&A for work. D2-250-1Version 4. numerical type (int, double, ttmath,. D1. hpp> This is an overloaded member function, provided for convenience. Search: To search for a specific part number, use your browsers's "Find" feature by pressing "Ctrl+F" ("Command+F" on Mac systems) Enter the part number you're looking for, and you'll be taken right to the part number. } B. Press these Keystrokes D2–HPP Display Results 1. 00 PC-DS100 Free PC-R60-U (upgrade) $291. 66 kg/m Peso por lado 155. The function distance implements function Distance from the OGC Simple Feature Specification. *", several images with the same timestamp means that they are the same pattern that are photographed. Handheld prog D2-HPP 200 0 0 E Maximum Current Required 700 580 0 F Remaining Current 700 220 500 Example of System Power Requirements Calculation DL3 PLCs tDL3-12 1--33-4 For the latest prices, please check AutomationDirect. 00. Afterapowercycle,D2-HPP DV-1000 D4-HPP-1 CLICK PLC Hardware User Manual, 6th Edition, Rev. 0. For example, if you select Power. . One and only one of COVAR_SCRAMBLED and. Direct. The code below assumes that boost/geometry. Solamente D2-HPPs con la versin de firmware 2. (This means it’s okay if a file gets included twice. g. ) max_distance. If you use the instructions except for the MOV instruction to write data into the non--volatileV--memoryarea,youonlyupdatethedatainRAM. Title. The Boost. After a power cycle, the PLC always copies the data in the flash ROM to the RAM. The Handheld Programmer Upgrade Tool was created by Automation Direct. Note: this fix I will be doing in 2 steps: cleanup the build WIP on [pgr3. Both classes need to forward-declare each other, in their header files, i. DL06 Micro PLC User Manual, 3rd Edition, Rev. 00 PC-DS100 Free PC-R60-U (upgrade) $291. com. Once again, the display screen may have a different format depending on the mode selected. Other libraries refer to this functionality as ST_GeomFromText or STGeomFromText. After a power cycle, the PLC copies theHandheld programmer. Apply. SOFT There is no way to read data from the Flash ROM directly. I/O Quick Chart Selection The eight versions of the DL105 have Input/Output circuits which can interface to aPLC DIRECT D2-HPP DL205 HANDHELD PROGRAMMER. Multiple model numbers may indicate different products, different components within the products or both. On any device & OS. The parameter is similar to D1 . objectPoints. It is well suited for performing basic PLC maintenance and troubleshooting of. DL205 Programming Tools and Cables D2--DSCB L RS232C PersonalComputer Product iQ offers professional level information and is free for most users. hpp"class D1 : public B {.