beautypg.com

Creating project files—modbus master to devices – Siemens DTU3005-B User Manual

Page 33

background image

5

Creating Project Files—Modbus Master to Devices

Siemens Energy & Automation, Inc.

29

5.2

Configuring the Project File

Once you have created or opened the project file,
select Edit from the main menu. When the Device Pro-
tocol for port 2 is set to SEAbus (see Section 5.4), the
following menu items appear:

Port 1 (Modbus Master)

—allows you to select the

protocol (RTU or ASCII) and configure the com-
munications settings for the Modbus Master
device connected to port 1.

Port 2 (Devices)

—allows you to configure commu-

nications settings for SEAbus devices or Siemens
Protective relays connected to port 2.

Port 3 (Modbus/Passthrough)

—allows you to

select whether port 3 is used as a passthrough to
the devices on port 2, or used for connection to a
second Modbus Master device.

Diagnostics

—allows you to indicate if you want

the DTU3005 to write communications diagnostic
information to the Modbus Master.

Device Command Registers

—allows you to indi-

cate which PLC registers will be used for device
commands.

Device Defaults

—allows you to set the default

data registers for more than one device of a cer-
tain type, e.g., set the defaults for all 4720 power
meters or all S7-I/O units. The data registers can
still be customized for each device, as required.
See Section 5.7.2 for more information.

Device List

—allows you to indicate which SEAbus

devices or Siemens protective relays are con-
nected to port 2 and which PLC registers they are
communicating with.

Note: If the Device Protocol for port 2 is set to

VDEW (see Section 5.4), then two addi-
tional menu items are available: Global
Command Registers

and Device Text to

Values Table

. See Section 5.8 and Section

for instructions on using these menu items.
In addition, the port 3 menu item is
changed to Port 3 (Modbus Master)
because the passthrough feature is not sup-
ported with VDEW devices. The instructions
in Section 5.3 are applicable to port 1 and to
port 3 for VDEW devices.