Changing Device And Dtm Addresses - Omron CJ Series Operation Manual

5 Operation
5-2-2

Changing Device and DTM Addresses

In order to achieve communication between the Master Unit and its allocated slave devices, the latter
must have the same physical network address as set in the configuration. The network address on the
slave devices are usually set
• through dip switches or rotary switches on the device, or
• remotely, using the dedicated Set_Slave_Add PROFIBUS service and stored in the device.
The physical address setting may differ from the slave DTM address, which was automatically assigned
by the Master DTM.
 Changing the Slave Device Address
Slave devices which are not equipped with switches to set the address, must support the
Set_Slave_Add PROFIBUS service. Typical device types supporting this address setting method
are PROFIBUS PA devices or IP65 devices.
The default address for these devices is 126. This allows them to communicate with a Master unit,
with the purpose of changing the address. I/O data exchange with slave address 126 is not allowed.
Usually, these slave devices also provide a means to store the remotely set address in local non-vol-
atile memory.
As of Unit version 2.0, the CJ1W-PRM21 PROFIBUS Master Units support the Set_Slave_Add
PROFIBUS service, which can be initiated from the Master DTM. This service can be sent to any
slave on the network, even if it is not allocated to the Master DTM.
In order to change a slave device's address remotely, first make sure that the Master DTM is on-line
with the Master. Next, open the Set Device Station Address window:
1
Select the DTM in the Network view.
2
Right click the mouse, and select the Additional functions entry from the context menu.
3
Select the Set Device Station Address option.
The window as shown below is displayed:
5-8 CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)