GE instruction manual P485 Modbus to Profibus Converter User Guide

SOFTWARE OVERVIEW

The Modbus Command column shows the Modbus command assigned by the wizard. The Modbus command is automatically selected by the wizard based on the selected address and direction.

CONNECTING DEVICES The fourth step in the configuration wizard connects one or more devices to the sub- network. Devices on a sub-network are also known as nodes (Modbus slave devices) and are the actual nodes that will be physically connected to the Modbus sub-network. It is possible to connect devices of the same device type more than once. The created nodes will be listed to the left.

The Node window is shown below:

The Create Node button adds a new node (Modbus slave) to the sub-network. A new row will be added to the node list to the left. The Remove Node button to remove the selected node. Select a node in the node list by clicking on the desired node.

When a new node is created, the wizard assigns it a default name. Enter the desired node name in the Node Name column. The node name is typically a name that identifies the device in your application. Examples are “Lube pump1”, “Production Feeder” and “Main transformer “. Do not confuse the node name with the device name assigned at an earlier stage – the device name is typically the technical name or designation of a device found on the devices name plate (for example, “MM2”, “SR469” and “PQMII”).

Enter the Modbus slave address of the sub-network node in the Slave Address column. The wizard automatically assigns a default address which can be changed as needed. The node address must match the slave address setting of the device you are connecting. If you only connect one node, this address setting might be irrelevant, depending on the operation of the device.

The Device Type column is where previously configured devices are connected to the sub- network. If you click a row in the device column, a list will appear containing all previously configured device(s). Select the desired device from this list.

P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE 4–7