The Foxboro documentation (I have up to Version 7.1) says that the SPT parameter on all the PID blocks is connectable and not-settable. It's my understanding that it's the other way around. You can set the parameter from the SELECT screen or DM/FV but can only connect to the RSP parameter. Whose right? Regards Adam Pemberton Site Electrical & Control Systems Engineer Lihir Gold Limited _______________________________________________________________________ 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