Transfer of data

[sathya]

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

[Groo]

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.

[sathya]

thank u sir, i'm gng thru those blocks

[JesperMP]

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.