Hi Douglas, I don't have any experience with the SRB on DDC100 Master Station. But we have a configuration using DDC100 Limitork Master Station (Modbus protocol). I think this device can receive the same command in these two way: Using the analog mapping and using the discrete mapping. I mean, it is possible to send the same command (open/close a valve) using either the modbus function code 06 (pre-set single register) or 05 (force single coil) and you use the same address for any of these commands. You also can connect a boolean output of the GDEV/MOVLV block to analog output block (AOUT). The boolean is just converted to 1 or 0 in the MEAS input of AOUT block. Regards, Alexander Millan El Palito Refinery *************** PDVSA´S INTERNET E-MAIL USE *************** This message may contain information solely of the interest of PDVSA or its businesses. Copying, distribution, disclosure or any use of the information contained in this transmission is permitted only to authorized parties. If you have received this e-mail by error, please destroy it and notify webmaster@xxxxxxxxx or the sender by reply email. ****** USO DEL CORREO ELECTRONICO DE PDVSA HACIA INTERNET ****** Esta nota puede contener informacion de interes solo para PDVSA o sus negocios. Solo esta permitida su copia, distribucion o uso a personas autorizadas. Si recibio esta nota por error, por favor destruyala y notifique al remitente o a webmaster@xxxxxxxxxx ___________________________________________________________________ This list is neither sponsored nor endorsed by The Foxboro Company. Use the information obtained here at your own risk. For disclaimer, see http://www.thecassandraproject.org/disclaimer.html#maillist list info: http://www.freelists.org/list/foxboro subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave