RMC PROFINET Settings Page

To access the PROFINET Settings page:
In the Project pane, expand the Modules folder, double-click the CPU module and click PROFINET.

Use this page to configure the RMC's PROFINET settings.

Note: For the RMC200, in order to communicate via PROFINET I/O, the Ethernet Protocol Mode must be set to PROFINET. This setting is on the Ethernet Settings Page.

PROFINET I/O Device Name

The primary identifier for PROFINET controllers and devices is the device name. Each PROFINET IO station on the network must have a unique device name. The IO-Controller will scan the network for devices with the names it was configured to access. In many cases, the IO-Controller will assign IP addresses to the devices after they have been found using the device name.

Valid device names are defined in the PROFIBUS standard, but in general must obey the following rules:

The device name can consist of one or more labels, each separated by a period (.).
Each label consists of numbers and lower-case letters, and may have embedded hyphens (-).
Each label can be up to 63 characters long, and the total device name can be up to 240 characters long.

The following examples are valid device names:

rmc150e

rmc150e-1

rmc150e-1.company.com

Outgoing Cyclic I/O Data

Select the location in the RMC of the cyclic PROFINET I/O data that will be sent from the RMC to the PLC. Typically, you will choose this location from the Indirect Data Map. This data will appear in the PLC as Input Data.

This section defines the starting address. The length is specified when configuring the PROFINET connection in the PLC.

See the Using a PROFINET I/O Connection topic for details.

Incoming Cyclic I/O Data

Select the location in the RMC where the cyclic PROFINET I/O data sent from the PLC to the RMC will be stored. Typically, you will choose this location from the Indirect Data Map. This data will appear in the PLC as Output Data.

This section defines the starting address. The length is specified when configuring the PROFINET connection in the PLC.

See the Using a PROFINET I/O Connection topic for details.

Sync Register

Choose whether to use a Sync Register for the incoming I/O data. The Sync Register provides a means for the PLC to synchronize the incoming data and the outgoing data. For more details, see the Using a PROFINET I/O Connection topic.

Custom Data Records (RMC75 and RMC150)

As described in Using PROFINET Record Data, for the RMC75 and RMC150, data records 7-255 are pre-defined to hold the contents of the RMC register files 7-255. However, these records limit you to read and write starting at the beginning of each file.

To work around this limitation, you can define up to four custom data records. Enter a starting address for each custom record you want to define. For example, if you want to write to the variable table starting at variable 20, then you could device Custom Record 1000 to have a starting address of %MD56.20. The IO-Controller could then write to PROFINET Data Record Index 1000 to access a block of registers starting at variable 20.

Note: The RMC200 data records are listed in the PROFINET Data Records Address Map.

Setting the Byte Order

The RMC supports both Most Significant Byte (MSB) First and Least Significant Byte (LSB) First. The default is MSB First, which should be correct for most PROFINET controllers, including Siemens S7 PLCs.