Communication
6.4 Communication via PROFIBUS
Control Units CU240S
160
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
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