Did you know that your purchase of a Cloud Connect Advanced entitles you to free monitoring? Free basic monitoring, not only for your Tigo optimizers, but also for any number of other devices such as:
- Revenue Grade Meters
- Weather Stations
Your CCA can accept data from all of these devices and upload it to the cloud. The data can be viewed and analyzed at any time.
Setting up Devices
You can see examples of how to do this in our article "Set up Inverters, Meters & Sensors". It can even be done from the Tigo SMART Mobile App.
How does it work?
These devices communicate with the CCA using Modbus, a serial data communication protocol. There are two methods that can be used, Modbus TCP and Modbus RTU. Modbus TCP uses a LAN (Local Area Network) and usually ethernet for communication. Modbus RTU uses a serial cable, normally RS-485, to connect the device to the CCA. The data protocol (Modbus) is the same either way. It is just the transport that differs between Modbus RTU and Modbus TCP. Either way, each device has a Modbus ID which is an integer that is unique in the chain. For example, the first device might have Modbus ID "1", second device is "2", and so on.
For Modbus TCP devices, both the device and the CCA must be on the same subnet. See below. This usually means that both the CCA and the device are connected to the same router.
For an example of setting up Modbus TCP, see our article "Set up Inverters, Meters & Sensors".
Modbus RTU (RS-485)
Modbus RTU uses a direct serial cable for communications. The CCA has two RS-485 ports. Multiple devices can be daisy chained into either port. There is normally a limit of 32 devices per chain.
For an example of how Modbus RTU works, see our article "Monitor SMA Inverter via RS485".