Siemens DTU3005-B Betreibershandbuch PDF herunterladen (Seite 33)

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.

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