Hi all,
I recently ran into a problem with my latest project. I am using a MicroLogix 1100 PLC, and have 4 remote IO modules that talk to it via Modbus TCP/IP (this is all going from the RTU port of the PLC, through an RTU-to-TCP/IP gateway, to the remote IO modules). Obviously the IO modules have to be the slave in this case. I also have an EZ Series HMI that talks via Modbus TCP/IP to the PLC. The HMI wants the PLC to be a slave in this case.
Is it possible to have the HMI be the PLC's master, and the PLC be the IO modules' master? If not, what options are there to get around this? Any help would be appreciated.
Thanks,
Jon
I recently ran into a problem with my latest project. I am using a MicroLogix 1100 PLC, and have 4 remote IO modules that talk to it via Modbus TCP/IP (this is all going from the RTU port of the PLC, through an RTU-to-TCP/IP gateway, to the remote IO modules). Obviously the IO modules have to be the slave in this case. I also have an EZ Series HMI that talks via Modbus TCP/IP to the PLC. The HMI wants the PLC to be a slave in this case.
Is it possible to have the HMI be the PLC's master, and the PLC be the IO modules' master? If not, what options are there to get around this? Any help would be appreciated.
Thanks,
Jon