Sergio, It appears your INT30B is using the standard Modbus driver to communicate with the S7 PLC. This should work fine with the Prosoft modules as well. In your ECB16s you probably need to make a couple changes. If memory serves, you'll probably want to change PCTYPE from 4 to 2. PCADDR will be set to the address of the Prosoft module. You'll need to check your Prosoft manual to see if the module supports heartbeat (HBEAT option), and multiple writes (MULTWR, 0 uses modbus function 5 and 6, 1 uses modbus function 15 and 16). You'll want to check your ECBPG block also and confirm address, baud rate & comms parameters, and probably review your settings for retries and response times (BUSTYP and PIOWDT). Foxboro manual B0193RL has details on configuration for these Modbus Integrators. Cheers, Kevin _______________________________________________________________________ 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