Rockwell Automation 20-COMM-H RS485 HVAC Adapter FRN 2.xxx User Manual
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Installing the Adapter
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
1. Set the adapter’s node address by rotating the node address switches to
the desired value for each digit.
Important: Each node on the network must have a unique address.
Figure 2.1
Setting the Node Address
2. Set the network protocol switch.
Figure 2.2
Setting the Network Protocol
The switch settings can be verified using a PowerFlex HIM, DriveExplorer
software, or DriveExecutive software, and viewing Diagnostic Device Item
numbers 40-42 (
).
Setting
Description
01 – 99
Node address used by the adapter.
00 (Default)
If network protocols are capable of handling a node address of 0 or node
addresses higher than 99, these addresses can be configured by setting the
switches to 00 and then setting Parameter 03 - [Net Addr Cfg] to the
desired network node address.
Setting
Description
RTU (Default) Modbus RTU
N2
Metasys N2
P1
Siemens Building Technologies P1 FLN
2
1
0
9
8
3
4
5
6
7
2
1
0
9
8
3
4
5
6
7
RTU
N2
P1