Siemens DTU3005-B manual Configuring Custom Device Registers

5 Creating Project Files—Modbus Master to Devices

change the starting register to 10, the last register will automatically change to 51.

Note: The Modbus Master must read these regis- ter numbers to be able to access the real- time data for this device.

6.Press Shift+Tab, or click the left mouse button to highlight the File field and enter the file number. This parameter is used only with Allen-Bradley PLCs to specify the file number in the PLC that contains the register values that are transferred to or from the device.

7.The device command registers are displayed below the real-time data registers. They are con- figured from the Device Command Registers menu selection on the Edit menu. See Section 5.11 for information on setting these reg- isters and programming the PLC to perform com- mands. Be sure that the register numbers are not also used by the device. This can cause unex- pected operation of the device.

8.If you want to use a customized subset of the available data registers, see Section 5.7.2 for instructions on creating a default set of custom registers for all devices of the same type. Type an “X” in the Use customized real-time data order- ing? field to begin the custom data setup, or press Tab to go to the next field.

9.Enter the Real-Time Data Delay Time in its field. This is the delay from the time that the DTU3005 receives data from the device to the time the DTU3005 transfers the data to the PLCs registers.

10.Select Save to save the device information to the project file, and then select Ok or press Esc to exit the device list configuration screen. If at any time you want to return to the last saved version of the device list, select Revert without saving any changes.

Removing a Device

To remove a device from the device list, highlight the device on the left side of the screen and press Tab or Enter. Then change the device type to Not In Use.

Additional Options for Data Registers

The Device List screen has three additional options for working with a device’s data registers:

•Select Set Reg to place the data registers into contiguous register numbers and minimize the size to the data register block. This option also sets the initial register number to 1.

•The Set All command performs the same function but allows you to set the initial register number. See Appendix A for information on acceptable register number ranges for each PLC model.

•Select Pack to minimize the size of the command register block, removing registers for deleted devices.

Saving the Device List Configuration

Once you have entered the device information for all the devices attached to port 2, select Save to save the device information to the project file. Then select Ok or press Esc to close the device list configuration screen.

If you have changed the device information and have not saved it to the project file, you will be prompted to either save or discard the changes.

Select Revert to return to the last previously saved configuration without saving any changes.

5.7Configuring Custom Device Registers

You can configure which data items from the SEAbus or VDEW devices are transferred from the DTU3005 device to the PLC or Modbus master. In this way, the DTU3005 acts as a data concentrator, in addition to converting the SEAbus and VDEW protocol data. You can configure the custom data items so that every device of the same type sends the same data items (see Section 5.7.2), or have each device send particu- lar data items of interest (see Section 5.7.1). SEAbus devices can be configured to send 16 words of device data. VDEW devices can be configured to send from 1 to 64 words.

5.7.1Configuring Custom Registers for a Single Device

To configure custom registers for a single device:

1.Select Device List from the Edit menu.

2.Highlight the device that you wish to configure and press Enter.

3.Highlight the Use customized real-time data ordering? check box. Press the spacebar to place an “X” in the check box. Then select Custom Data to display the Customized Real-Time Data dialog box.

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