ModBus RTU

Hello all,
just starting exploring Flowstone.
Modbus is referred as supported via COM port component RS232, in the interfaces section (Data Acquisition paragraph), in the FlowStone site, but I haven't seen any such module.
I have seen a nice Modbus TCP module and wondering if there is an implementation for Modbus RTU
through a serial or USB (virtual serial) port.
Could anyone supply some more information about Modbus RTU implementation in Flowstone?
Do I have to built it from scratch or there is a ready module ?
Many thanks
just starting exploring Flowstone.
Modbus is referred as supported via COM port component RS232, in the interfaces section (Data Acquisition paragraph), in the FlowStone site, but I haven't seen any such module.
I have seen a nice Modbus TCP module and wondering if there is an implementation for Modbus RTU
through a serial or USB (virtual serial) port.
Could anyone supply some more information about Modbus RTU implementation in Flowstone?
Do I have to built it from scratch or there is a ready module ?
Many thanks