Siemens SINAMICS CU240S DP-F Operating Instructions Manual page 160

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Communication
6.4 Communication via PROFIBUS
For the acyclic communication in OB1 a read/write request must be send to the drive with RD_REC
(SFC 59) and WR_REC (SFC 58)
Figure 6-11
Acyclic communication for request and response data block in OB1
Control Units CU240S
160
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD

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