Jim, The error code is either an 01 or an 09. (Sorry, I forget at the moment.) You will likely have to look at the Modbus documentation for the slave device you are connected to. We have an FBM224 connected to a Modbus device that occasionally returns the code "06" when it is too busy to respond to the request. Unfortunately, the I/A system treats this as a hardware error, triggering a SYSMON error. Steve Shimp Maintenance & Systems Engineer ExxonMobil Paulsboro Lube Plant phone: 856.224.5059 cell: 609.820.8501 fax: 856.224.5030 email: steve.shimp@xxxxxxxxxxxxxx foxboro-bounce@xxxxxxxxxxxxx wrote on 01/25/2008 10:57:33 AM: > We have a FBM224 installed and occasionally get error messages of: > 01-24-08 13:45:10 0 SYSMON = F1SYS2 F1CP13 Process = 1R0117 > -39 1 HIGH MB P1 01 Alert 01 09 Exception Code > > Anybody have any information on where to look for what this error > code is trying to tell me? > > Thanks, > > > > Jim Kahlden > System Reliability Analyst > Lower Colorado River Authority > Fayette Power Project > 6549 Power Plant Road > La Grange, TX 78945 > (979) 249-8514 (Ph) > (979) 249-8390 (Fax) > jim.kahlden@xxxxxxxx _______________________________________________________________________ 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