I am having a delay in the raw data showing up in my software, most noticeably with the analog data. I know the data is being processed faster because I can see it on the HMI. Also my coworker can hook up to the plc and there is no delay in the raw data signal (he uses the same cable). Any suggestions

PLC- Scadapack
Software- Telepace
Comms- RS232
Protocol- Modbus RTU

See pic. Check the setting under PC Commnication Settings.
Any other software trying to use the serial port of your PC? Allthough this would probably result in a loss of comm.

Also another source for you. CM forum see link
http://scadaforum.controlmicrosystems.com/...x.cfm?forumid=5