User manual

Ethernet TCP/IP Modbus Application Protocol
33002479 06 07/2008 345
Limitations The Modicon Quantum Ethernet module supports up to 64 simultaneous Modbus/
TCP server connections. To guarantee consistency of changes to the controller
configuration, the module allows only one programming panel to be logged in at a
time.
The module supports these Modbus/TCP commands:
z Read Data
z Write Data
z Read/Write Data
z Get Remote Statistics
z Clear Remote Statistics
z Modbus 125 Commands (used by programming panels to download a new exec
to the module
For More
Information
For more information about Modbus communications, consult the Modbus Protocol
Reference Guide (PI-MBUS-300). For more information about communication
blocks, consult Chapter 4, Transferring Data Using Communication Blocks (see
Transferring Data Using Communication Blocks, p. 125).