Allen-Bradley PLC-5/250 via TCP/IP - Hardware Setup

There are two methods of connecting to a PLC-5 series PLC:

• direct

• offlink.

Direct Ethernet

PLC-5E model PLCs can support a direct Ethernet connection. In this case all that you need to do is assign the PLC an IP address, by using the BOOTP utility (refer to the Allen-Bradley documentation). Test that the network and IP address is valid by using the Ping program (explained in the TCP/IP Guide).

Offlink

In the case that you have PIs connected via DH or DH+ through another 5/250 or AB-KA, you can still access them through Offlink Addressing. Follow these general steps:

1. Set up the PLC 5/250 resource manager or AB-KA module. Assign the IP address, and test that it is valid by using the Ping program (explained in the TCP/IP Guide).

2. Set up the PLC-5 for communications on the DH or DH+ network to which it is connected. Set the Node Address, Baud rate etc.

3. Check that you can communicate to the PLC using offlink addressing. You can use the utility accompanying the Allen-Bradley Interchange software to verify that you can communicate from a PC over Ethernet.

Plant SCADA Computer Setup

It is recommended you setup your specific Ethernet card as required and confirm basic network communications before proceeding with the communications configuration for the ABTCP driver. Refer to the documentation accompanying your hardware for instruction.

Setup the TCP/IP protocol on your Plant SCADA computer.