Cp340

Hi all,

Who knows the difference between the P_Send and the P_Send_OLD function blocks for sending data with the CP340? Is the choice of the functionblock dependend on what CPU is used?

Thanks

Here is the answer:
http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&siteid=cseus&aktprim=0&extranet=standard&objid=10805179&DataKey=10805179&treeLang=en

You should read article "Download CD CP340...." Version V5.1+SP5 (etry ID:21767908)

Link in previous message may not work. Here is simple explanation from Siemens web page:

The "old FBs" remain in the block library under different no.’s, so that users with legacy CPUs (*) in which the SFBs 52/53 (RDREC/WRREC) are not implemented, can at least work with the old FB versions!
à FB102 / FB3 (P_SEND, Version 1.3) à[ FB2 (P_RCV, Version 1.2) FB104 ]àFB103 / FB4 (P_PRINT, Version 1.1)

(*) S7-300 CPUs with MMC support the SFBs 52/53 as from firmware version V2.0
S7-400 CPUs support the SFBs 52/53 as from firmware version FW V3.0

Thank you Gregory for your very good reply !