Bosch Rexroth Tightening System 350 - Page 263

3 608 878 300 Tightening Technology | Bosch Rexroth AG 263/641
System 350 | 3 608 878 300/2019-03
RK512 Each telegram can send a maximum of 128 bytes of data. Larger data quantities are divided among
several telegrams. The RK512 protocol lets you "link" telegrams to generate sequence telegrams (see
Tables 6–24 (page 263) and 6–25 (page 264)). Here, the transfer of more than 128 bytes (number data
word) will be announced in the telegram header of the first telegram already. Once received, the data
divided among the telegrams will be re-arranged in the correct order.
When a telegram is sent with RK512, a reaction telegram is also sent from the receiver to the sender
containing information about the transmission and any transfer errors that may have occurred.
3964R With this protocol, each telegram can also send a maximum of 128 bytes of data only. Larger data
quantities are divided among several telegrams. Every telegram is a complete package, so there are no
sequence telegrams (see Table 6–26 (page 264)). By addressing directly consecutive memory areas, the
3964R protocol can also re-arrange larger data quantities that were transferred in different telegrams in
the correct order.
No reaction telegrams are used with the 3964 protocol. Only "block check sum" (BCC) and "positive
acknowledgement" (DLE) are used for data security.
Table 6–24: Setup of send telegram for the RK512 protocol as implemented in the tightening system
Protocol CS351/
KE350
(PLC)
Value PLC
(CS351/
KE350)
Meaning
Name Hex
Send telegram 3964R  STX 02  Start character
 DLE 10  Positive acknowledgement
Telegram header  1. Byte 00  ID
 2. Byte 00  ID
 3. Byte 41  Command SEND "A"
 4. Byte 44  Data element "D"
 5. Byte 0a  Data element no., e. g. DE 10=0a hex
 6. Byte 80  Data word no., e.g. DW 64=80 hex
 7. Byte 00  Number
e.g. 50 DW (= 32 hex)
 8. Byte 32 
 9. Byte ff  No CT
 10. Byte ff  All CPUs
Data  11. Byte  1 Data byte
 12. Byte  2 Data byte
 … 
 … 
 Xth byte  n. Nth data byte (128  n)
3964R  DLE 10  End ID
 ETX 03  End ID
 BCC  Block check sum
 DLE 10  Positive acknowledgement
Reaction telegram 3964R  STX 02  Start character
 DLE 10  Positive acknowledgement
Telegram header  1. Byte 00
 ID
 2. Byte 00  ID
 3. Byte 00 
 4. Byte 00  Error number
3964R  DLE 10  End ID
 ETX 03  End ID
 BCC  Block check sum
 DLE 10  Positive acknowledgement