I have a question about the Profibus module. We have a customer who would like our system to communicate with a Siemens S7 300 PLC. They want to send us a setpoint and want us to send back data. I believe we can use Ethernet (TCP/IP) or possibly Profibus with the PROFI module. I’m sure the S7 will be the network master. Can the PROFI module operate as a slave? I plan on using an R2 controller.