GE Fanuc SRTP on TCP/IP

Transcription

1 Headquarters Subsidiaries France applicom international s.a. 43, rue Mazagran Caudebec-lès-Elbeuf International contact tel: + 33 (0) fax: + 33 (0) infointl@applicom-int.com National contact tel: + 33 (0) fax: + 33 (0) infofr@applicom-int.com Germany applicom international GmbH Im Gässle Leinfelden-Echterdingen tel: / fax: / infode@applicom-int.com United States applicom international, Inc 4340 Redwood Hwy, Suite D-309 San Rafael, CA tel: + 1 (415) fax: + 1 (415) infousa@applicom-int.com Benelux Euro View Services s.a. 273, Chaussée de Lodelinsart 6060 Gilly / Belgique tel: + 32 (0) fax: + 32 (0) infobe@applicom-int.com Italy I.M.A. S.r.l. (Italia Manutenzione Automatismi Piazza della Vittoria, 10 int.6 I Genova tel: fax: infoit@applicom-int.com GE Fanuc SRTP This document is for informational purposes only and is not contractual. applicom international reserve the right to improve their products at any moment without notice. applicom international, applicom the associated logos and the phrases opening up the industrial communication universe are all trademarks of applicom international and/for its subsidiaries. All other products or trademarks mentioned in this document are the property of their respective owners. applicom international - july 2000

2 Client and Server modes The range of GE Fanuc Series 90 PLCs uses TCP/IP for communication on Ethernet. The messaging used is SRTP (Service Request Transfer Protocol, GE Fanuc application layer). All layers made for GE Fanuc on applicom can be represented according to the following OSI model: Version 2.0 / july 2000 / page 2/9 applicom, open industrial communication concept 68

3 The Transport TCP and Network IP layers allow the communication, i.e. the data transport between the various peripherals presents on the network (PLC's, sensors, devices ). The application layer, here the, defines the data format of exchanges. The on applicom interface handles exchanges with GE Fanuc Serie 90 couplers such as: System Range Series Series Please contact us for other supported CPU/couplers. Ethernet Driver Ethernet interface CMM321 Ethernet interface type1 CMM741 Ethernet interface type2 CMM742 The applicom interface provides in standard the following functionality: " Client mode multi-requests to GE Fanuc Series and server PLCs on Ethernet TCP/IP : Reading and writing variables in the various memory areas of PLCs and Series. " Server mode for GE Fanuc Series and PLCs, access to the applicom database and equipment monitoring. The use of is available on applicom interface simultaneously with the other TCP/IP messagings from applicom offer TCP/IP multi-messagings. Version 2.0 / july 2000 / page 3/9 applicom, open industrial communication concept 69

4 Client mode In client mode, the applicom interface takes the communication initiative to the server equipments. The applicom client mode can be used to send several requests simultaneously to an equipment before having received the first response: this operation is called multirequest. To send several requests simultaneously, several connections are used. The applicom interface manages 128 connections. Only 30 of them can be used simultaneously for all equipments. Version 2.0 / july 2000 / page 4/9 applicom, open industrial communication concept 70

5 The applicom interface can read and/or write major PLC data types thanks to applicom library/dll, DDE server, OPC server and ActiveX control: et Series Device data type Internal Input Output applicom data Bit %M, %T, %I %Q %G, %S, %SA, %SB, %SC OByte %MB, %TB, %IB %QB %GB Word (16-bit) [1] %R, %P [2], %AI %AQ %L [2][3] Double word (32-bit) %RD Floating point (32-bit) %RF Format IEEE [1] : Standard and BCD format. [2] : Variable only available on series. [3] : %L variables require previous configuration of subprograms. Maximum number of variables per request with OPC server Data type Read Write [4] applicom data Bit Byte Word (16-bit) Double word (32-bit) Floating point (32-bit) Format IEEE [4] : Maximum quantity in write is always 1 if you are using PCDDE application. Version 2.0 / july 2000 / page 5/9 applicom, open industrial communication concept 71

6 SRTP Messaging - Client mode performance The applicom interface must provide feedback variables coming from 5 stations (Series 90-70,CPU CPX772,CMM742 Ethernet coupler) with a cycle time of 20ms. No inter-plc exchange is active. Amount of data per station 3 tables de 757 mots, 1 table de bits. applicom Data-Base retrieval time (out of application and scada) to get data from 5 stations, i.e words and bits, 20 requests are necessary : with 1 simultaneous request by station 20 (requests) / 75 (requests /s) = 0,267 second with 2 simultaneous requests by station 20 (requests) / 260 (requests /s) = 0,077 second Beyond 5 equipments it is preferable to configure only one simultaneous request per station to avoid a extra network load. Version 2.0 / july 2000 / page 6/9 applicom, open industrial communication concept 72

7 Server mode The GE Fanuc server on applicom interface provides, for clients using GE Fanuc network architecture, a database of 32K Words and 32K Bits. This data base, called applicom Data-Base, could be access in Read and Write modes. applicom Data-Base management for PLC clients Supported requests Max. number Corresponding PLC variables/request addresses Read/Write bits (%M) %M1 to %M32768 Read/Write word (%R) 765 %R1 to % R32768 The GE Fanuc server functionality on the applicom database can be used to optimize information feedback. Rather than permanently polling the equipments to monitor variables which change status occasionally, the equipments can store the information to be feed back in the applicom database only on status changes (alarm feedback). This operating mode results in: " PLC processors less solicited. " Network architecture less heavily loaded. " Minimized information feedback time. This principle can be made reliable by using a monitoring mechanism of PLC client connections : " You can define in the configurator a global maximum time between the accesses of the client equipment to the applicom GE Fanuc server. After this interval, the absence is indicated to the application by an "ACCESS STATUS WORD" in the applicom Data-Base. " Your application can read (or write to reset) a counter word which is located in the applicom Data-Base words area "ACCESS INDICATOR WORD" to inform about the current number of writes made by the client device in the applicom Data-Base. Version 2.0 / july 2000 / page 7/9 applicom, open industrial communication concept 73

8 Diagnostics The applicom package includes, free of charge, a set of diagnostic tools to test your communication without developing any kind of application. Those tools are an essential help to valid the good running of your industrial communication. You can use them in the same time than your applications. They are sorted in two categories: Diagnostic tools for network analysis Depending of the protocol used, thus on the transport type, these tools are specialised in the network analysis. They inform you about the traffic and this in real time (load rate, emitted requests number, flow / seconds...). Two modes are available : normal or advanced. The screen is displayed through a graphic tree representation. The object symbols inform on equipment current state (connected, active, error, not configured...). Version 2.0 / july 2000 / page 8/9 applicom, open industrial communication concept 74

9 Data access utilities These utilities enable you to access in read and write modes to PLC data's and to applicom Data-Base. Each access returns a status word and a text comment giving feedback result. You can used, constently, the applicom diagnostic tools. These tools cohabit with your applications. Compatible applicom boards ISA Bus PCI Bus PC/104 Bus PCI2000ETH Version 2.0 / july 2000 / page 9/9 applicom, open industrial communication concept 75