Yes, a 3-state device block has been on my wish list also. We use quite a few - 2-speed motors, 3 position diverting valves, bulk/dribble feed valves. We have created a series of CALC blocks and a CIN for alarm generation to handle these devices and make them appear as standard devices to the operators. We also use GDEVs to handle Hand Valves (manually actuated valves with position feedback limits). We add a logic block to manipulate the DSR when the operator moves the valve. Again, it allows them to appear and act like a "standard" GDEV valve. Would be glad to share any of these if anyone is interested. Tom Badura Plastics Engineering Company tbadura@xxxxxxxxxx -----Original Message----- For motors I wish they had 3 states, and momentaries, a la old-school Brand H (maybe new-school Brand H, too, I don't know), but yes, GDEVs are better than the several-CIN/COUT alternative. For on-off valves they are great. I now typically use them for generic operator-interface "soft switches" as well, for consistency, and because COUTs do not have configurable state text. Corey Use Gdev's, No need for Calc blocks, no need to invent the wheel again...... We've been using them form the start, but configured for PLB use. One block gives you the control over the valve and complete status feedback (STAIND), also has nice features for interlocking etc.... Couldn't live without them..... Kind regards Dirk _______________________________________________________________________ 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