Hello,
I have a problem communicating to an Omron MX2 VFD using RS485 MOBUS with a V430.
Basically I have all of the required FB's for MODBUS Serial. The port is configured, the MODBUS protocol is confured, the drive is configured. I can monitor the queries and responses on the HMI in Config mode and see that the data is exactly as is should be. I can also see the data change in the drive parameters.
The problem I have is that in Visilogic, I never see the data from the queries. For instance, I will execute a Read Coil (Function #1). I have all the correct parameters set. The actual data monitored on the HMI shows the data as I expect it to be (at least 1 coil is high). But in my logic, I never see the data on the output side of the FB. I also see the total sessions increment by one every time it is executed, but the Acknowledgment number never changes (it's always been 0). I also never see anything other than 0 for the status (which indicates no problems). I don't understand what I might be missing and any insight would be helpful.
Hardware:
V430-J-R34
Omron 3G3MX2 Inverter
Config:
V430: Node 1, Comm 1, RS485, 57600, 8, n, 1 - Termination set
MX2: Node 2, 57600, 8, n, 1 - Termination set
(this is the test setup. Eventually there will be more drives attached to the system hence the need for RS485)
