84 Rockwell Automation Publication 1420-UM001E-EN-P - March 2016
Appendix C PowerMonitor 500 EtherNet/IP Device Profile
Modbus TCP/IP
The communication module supports Modbus TCP/IP. The protocol is the
same as the PowerMonitor 500 unit with RS-485 (Modbus RTU). See Chapter 4
for protocol details. In this product, only one Modbus TCP/IP connection (one
socket) is allowed.
The EtherNet/IP and Modbus TCP/IP do not run concurrently. If
ModbusTCP/IP communication occurs, EtherNet/IP communication stops
temporarily but recovers in a minute or two.
ACD
If an address conflict is detected from the communication module, then the base
module displays ‘ACD Found’. In that case, it is necessary to check the network
configuration, resolve the problem, and then cycle control power to the power
monitor to re-establish communication.
TCP/IP Port
Default EtherNet/IP ports include the following:
• UDP (implicit message): 2222 (0x08AE)
• TCP (explicit message): 44818 (0xAF12)
You can reassign the default Modbus TCP/IP port: 502 (0x01F6).
We recommend that you use Modbus TCP/IP to configure or write to the
PowerMonitor 500 unit and that you use Ethernet/IP to read the PowerMonitor
500 unit.
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