"Can you perhaps expand on just exactly what is Brand H tri-state ?" As Jerry said, the Brand H digital composite point had two contact inputs and three contact outputs. The mapping of the 3 block states to the states of the inputs and outputs was configurable. One other feature it had is that up to two of the states could be momentary. I used this latter feature to emulate a hand-auto-off switch in the DCS that matched the one we commonly had in the field; it nicely avoided the problem of having to put the block in the STOP state, then back in the RUN state to get the start pulse again. There were some other niceties as well; a software "tagout" function, myriad interlock and bypass functions, and timers/counters to show number of state transitions, time of last transition, and time spent in each state. I think it also had independent state, input/output mismatch, and transition alarms, but my RAM isn't ECC and may have a few bit errors in that area. "I've had success with using the text fields the GDEV includes. It means a bit more work in setting up the display bits and pieces, but once one is done, it copies easily. Are you talking here about Detail faceplate use?" Yes, this is what I do as well. It works fine, but just feels like overkill when I could use a COUT (if it had labels). Corey Clingo BASF Corporation _______________________________________________________________________ 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