Rexroth Tightening System 350 System Documentation - Rhino ...

122/316 Bosch Rexroth AG | Tightening Technology 7 Data Services7.3 3964R communicationVarious partner controllers can be used to identify and store tightening results. Two connections can beactivated for the 3964R/RK512 protocols.7.3.1.4 Storage organization for ID code and results data transferSo-called data elements are used for data addressing. Here, the storage area reserved for data exchangeis divided into blocks of 512 bytes. DB numbers (DB = data element) and DW numbers (data word = 2bytes) are used for addressing data in and to data elements. The target address comprising DB and DWnumbers is listed in the telegram head when transferring data. This option ensures that the target addressis always clearly specified.The input data area is configured using data elements so that the partner controller can file ID codes inthis format. The partner controller has to have a similarly configured memory for the Compact System tofile tightening results there.Example A 128 kB linear storage area is divided into 256 data elements with 512 bytes (corresponds to 256data words). The first word (2 bytes) of the first data element thus has the address DB=0, DW=0. Thelast 2 bytes of the storage area have the address DB=255, DW=255.Data element 0 Data element 1 Data element 2 Data element 254 Data element 255Data word 0 1 2 3 4 5 253 254 255Figure 7–30:Division of the storage area into data elements and data wordsThe data to be transferred (ID codes or tightening results) is entered in the data elements according toa fixed format (however this can be configured for tightening results). Afterwards, the data elements aretransferred to the communication partner.7.3.1.5 Data block setup (telegrams)The data blocks or telegrams describe how the data to be transferred should be packed so that it can becorrectly assigned once it reaches the communication partner. The telegram contains the data as well asa telegram header and the control data needed to connect and disconnect the connection (backup layer).The 3964R and RK512 telegrams have a similar format, but some of the functions are not integrated inthe 3964R.RK5123964RThe telegrams can send a maximum of 128 bytes of data. Larger amounts are divided among several telegrams.The RK512 protocol lets you “link” telegrams to generate sequence telegrams (see Tables 7–16on page 123 and 7–17 on page 124). Here, the first telegram will indicate in the header that more than128 bytes of data are being sent (number of data words). Once received, the data that was dividedamong the telegrams will be rearranged in the correct order.When a telegram is sent with RK512, a reaction telegram is also sent by the receiver to the sender withinformation about the transmission and any errors that may have occurred.This protocol can also only send a maximum of 128 bytes of data. Larger amounts are divided amongseveral telegrams. Every telegram is a complete package, so there are no sequence telegrams (seeTable 7–18 on page 124). Due to the consecutive addressing of storage areas, the 3964R protocol canrearrange larger amounts of data that were transferred in different telegrams in the correct order.System 350 | 3 608 878 040/05.2008