Chapter 4 Communications - 61 -
Figure 36 RS-485 Multi-drop Connections
RS-485 Multi-Drop
RS-485 multi-drop lets you connect up to 99 Aries drives together (see
Figure 36). Every drive is factory configured with a default address—zero (0).
Using the
ADDR
command, you can assign a unique address to each drive.
You must address each drive individually before connecting it to the multi-
drop network.
Notes
•
For RS-485 to work correctly turn off the echo mode (
ECHOØ
).
•
Zero (0) is not a valid address for a drive.
Setting up Drives for a Multi-Drop Network
1. Connect the drive you want to configure to a PC that is not part of the
multi-drop network.
2. Apply power to the drive.
3. Using terminal emulation software, send the following command—
Ø_ADDRi
(where
i
is the address you want to assign the new unit).
4. Remove power to the drive. The drive can now be installed in the
network.
5. After installing and connecting the drives to the multi-drop network, test
each drive—use safe methods suitable for your particular application—
to ensure each functions correctly.
To test each unit, send the
i_TREV
command, where
i
represents the
address of a drive.
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