Hi, I have come up with something like the below; then connect BO01 to MANSW parameter of the controller. I will test for pulsing MANSW possibly using OSP, or ON delay or OFF delay so that controller goes to manual only once if that happens STEP01 CLM M02 ; # LLL STEP02 IN RI01; LS6451 STEP03 LAC M01 ; 10% STEP04 SUB ; STEP05 BIP 7 ; STEP06 INC M02 ; LS6451 <10% STEP07 IN RI02; LS6452 STEP08 LAC M01 ; 10% STEP09 SUB ; STEP10 BIP 12 ; STEP11 INC M02 ; LS6452 <10% STEP12 IN RI03; LS6453 STEP13 LAC M01 ; 10% STEP14 SUB ; STEP15 BIP 17 ; STEP16 INC M02 ; LS6453 <10% STEP17 LAC M02 ; # <10% STEP18 IN 2 ; STEP19 SUB ; STEP20 BIP 23 ; STEP21 CLR BO01; NO LLL STEP22 GTO 24 ; STEP23 SET BO01; 2/3 LLL ! STEP24 EXIT ; Thanks Regards, Srini From: Subbiah, Srinivasan Sent: Thursday, November 27, 2014 12:58 PM To: foxboro@xxxxxxxxxxxxx Subject: 2OO3 logic Possible? Hi, I would like to try the 2OO3 voting logic in DCS to place a controller in manual if 2 of the 3 readings fail. I am trying to explore the CACA block or IND sequence block. Any comments, please pass it on, thank you for your time Kind Regards, Srini ________________________________ IMPORTANT NOTICE ! This E-Mail transmission and any accompanying attachments may contain confidential information intended only for the use of the individual or entity named above. Any dissemination, distribution, copying or action taken in reliance on the contents of this E-Mail by anyone other than the intended recipient is strictly prohibited and is not intended to, in anyway, waive privilege or confidentiality. If you have received this E-Mail in error please immediately delete it and notify sender at the above E-Mail address. Agrium uses state of the art anti-virus technology on all incoming and outgoing E-Mail. We encourage and promote the use of safe E-Mail management practices and recommend you check this, and all other E-Mail and attachments you receive for the presence of viruses. The sender and Agrium accept no liability for any damage caused by a virus or otherwise by the transmittal of this E-Mail. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave