Bradley Smoker PLC-5 user manual Communicating with ControlLogix Devices

11-32Communicating with Devices on an Ethernet Network

Communicating with ControlLogix Devices

TCP/IP

Comparing Multihop and Non-Multihop Messages Over Ethernet

When an outbound connection's inactivity timer has expired and a MSG is pending on that connection, the MSG receives an error.

On a multihop connection, the error is 0x18 (Broken Connection).

On a non-multihop connection, the error is 0x16 (Connection Timeout).

For non-multihop connections, the Connection Inactivity Timeout is user configurable. For multihop connections, it is not configurable. Instead, it uses a default timeout value of 17 seconds.

To communicate through a ControlLogix 1756-ENET module, you configure the multihop feature of a MSG instruction from the Ethernet PLC-5 controller (or PLC-5 controller with 1785-ENET sidecar module) to the target device. You need RSLogix 5 programming software. For more information, see the MSG instruction in the PLC-5 Programmable Controller Instruction Set Reference Manual, publication 1785-6.1.

If you want to go through the ControlLogix 1756-ENET module and out the

1756-DHRIO module to the target device, you:

•use Gateway configuration software to configure the 1756-DHRIO module routing table in the ControlLogix system.

•specify a Link ID number on channel properties for channel 2/3A of the Ethernet PLC-5 controller (or PLC-5 controller with a 1785-ENET sidecar module).

For more information about configuring a PLC-5 channel or specifying the path of the MSG instruction, see the documentation for your programming software.

TCP/IP communications have been updated for enhanced UDP message support and super-netting.

Publication 1785-UM012D-EN-P - July 2005