Can we use CI873 for communication with PP873 and AC550?Can we use CI873 for communication with PP873 and AC550?
1. There is necessary to check existing AC500 solution/CPU.
a) in case of model without ETH at the end (not embeded ethernet port) there is necessary to propose Modbus serial interconnection to panel and AC800M
b) in case of model with ETH at the end (embeded ethernet port) there is possible to propose Modbus TCP/IP or UDP/IP interconnection to panel and AC800M (you can combine it with serial interconnection if will be necessary according oint 1)
a) interconnection with AC800M can be via MMS, Modbus TCP/IP (ethernet which is embeded on panel) or any other suppoorted protocol (info you can find in datasheet at the end - section "supported communication modules")
b) interconnection with AC500 depends on existing CPU configuration/possibilities according point 1). I recommend Modbus TCP/IP or serial Modbus
Clear from previous points.
MMS (no interface - interconnection to ethernet network) - only panel
Modbus TCP/IP - necessary communication module
Modbus serial - check with your guys possibility to use embeded serial port on CPU or via serial communication module
We locally don´t use CI873. If you will have AC500 with ETH it seems there is not problem, regarding panel don´t know, but seems not. I assume there should be better to use Modbus/MMS because of future help/support in case of any configuration issues....