Connecting devices, Connecting devices –7 – GE P485 User Manual
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SOFTWARE OVERVIEW
P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE
4–7
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.