Eaton PowerXL DA1 Communications Manual page 14

2 Modbus RTU
2.2 Communications
10
Figure 2 shows a typical setup with a host computer (master) and any
number (a maximum of 63 nodes) of variable frequency drives (slaves).
Each variable frequency drive has a unique address on the network.
Addresses are assigned to each variable frequency drive individually with the
use of a system parameter and are independent of the drive's physical
connection (position) within the network.
The aforementioned system parameter used to assign addresses is:
• P5-01 for DA1 variable frequency drive,
• P-36 for DC1 variable frequency drive,
• P-34 for DE1 variable speed starter.
A DX-CBL-RJ45... connection cable with an RJ45 connector needs to be
used in order to establish communications between the master and slave ② .
If multiple slaves are being used, they need to be connected in parallel using
DX-SPL-RJ45... splitters ①.
A bus termination resistor is required at the last module on the Modbus line
③.
Modbus RTU for variable frequency drive DA1, DC1, DE1 09/16 MN040018EN www.eaton.com