Posted 12 May 2006 hi all, i'm new to SIEMENS , i'm communicating two S7-400 plc via ether net cp443 , i want to transfer a DB block to other plc and get back the value. by MPI i can use sfc 67 &68 , not thru global addressing Share this post Link to post Share on other sites
Posted 12 May 2006 S7 Blocks are: SFB/FB12 = BSEND SFB/FB13 = BRCV SFB/FB15 = PUT SFB/FB14 = GET SFB/FB8 = USEND SFB/FB9 = URCV SFB/FB62 = CONTROL Siemens manual mn_s7-cps-ie_76.pdf shows how to set up networking your PLC's, this and a whole load more are downloadable from Siemens own site. http://support.automation.siemens.com/US/l...=cs&treeLang=en I've used S7 across Ethernet but used third party blocks which just worked, so hopefully the above can help you more than my guesses. Share this post Link to post Share on other sites
Posted 16 May 2006 thank u sir, i'm gng thru those blocks Share this post Link to post Share on other sites
Posted 16 May 2006 If one PLC sends and the other answers by its own control, then use SEND/RECEIVE (FC5 AG_SEND/FC6 AG_RECV). For each send block there must be a corresponding receive block If the same PLC sends and retrieves the data. the other being completely passive, then use SFB14 PUT/SFB15 GET. Share this post Link to post Share on other sites