Unidrive UD70-UD70 Communication


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I have 2 Unidrive classic servo with an UD70 application modules. I need to communicate between 2 UD70 - just one integer number would be enough. So I am looking at manual which says that there is an option to communicate Drive-to-Drive via RS232 port and two 32-bit variables can be transmitted between them. But there is also an option to communicate via RS485 port. I am wondering if I could use mode 4 - Cascade mode to pas a parameter between them (device1->device2 and device2->device1) or this mode can be used just to pass a parameter from device1->device2, device2->device3... so in cascade mode.

Thanks in advance and best regards
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