Siemens DTU3005-B Betreibershandbuch PDF herunterladen (Seite 64)

Appendix A: Supported PLCs

60 Siemens Energy & Automation, Inc.

configured to do so by performing the following steps

when configuring the PLC Port in the DTU3005 Editor

Program:

1. Select “RTS Delay” in the RTS Control selection box.

2. Set the RTS Delay time to 2 ms.

A.9 Modbus PLCs and Devices

Registers Accessed

The DTU3005 will only access registers in the Holding

Area of PLC memory (40001 to 49999). When entering

should be entered. For example, to access register

number 40001, the value 1 should be entered. To

access register number 49999, the value 9999 should

be entered.

A.10 Omron PLCs

Registers Accessed

The DTU3005 will only access registers in the Data

Area of PLC memory (DM0 to DM9999). When entering

9999) should be entered. For example, to access regis-

ter number DM1, the value 1 should be entered. To

access register number DM9999, the value 9999

should be entered.

PLCs/Protocols Supported

The DTU3005 will communicate with any Omron PLC

that uses the Host Link Protocol. On many PLCs, this

requires the use of a Host Link Module.

A.11 Siemens S7-200 PLCs

Registers Accessed

The DTU3005 will only access registers in the V-Mem-

ory area of PLC memory (VB0 to VB9999) which are 8-

bit registers. Because the DTU3005 will only read and

write 16-bit values, it will use two consecutive 8-bit

registers in Siemens S7 PLCs to form a 16-bit value.

The first of these consecutive registers must be

located on an even boundary (i.e. VB0, VB2, etc.). The

low order byte of the 16-bit value is located in the low-

est numbered register and the high order byte is

located in the highest numbered register. These regis-

ters can also be accessed in the PLC program or in

Charts as 16-bit registers VW0, VW2, VW4, etc.

When entering register numbers, only the offset into

the V-Memory area (0-9998) should be entered. For

example, to access register number VW0 (VB0 and

VB1), the value 0 should be entered. To access register

number VW9998 (VB9998 and VB9999), the value 9998

should be entered.

Protocol Information

The DTU-3000 follows the Point-to-Point (PPI) protocol

specification for token passing masters used with Sie-

mens S7-200 PLCs. It will operate on a PPI network

along with other masters.

The fully implemented, multi-master version of the PPI

protocol is very slow because of the token passing.

Therefore, a unique feature has been implemented on

the DTU3005 which allows it to run as a single master

with no token passing. This feature can only be used

when no other masters are present on the PPI net-

work. To activate this feature, enter the value 125 into

the DTU Address field on the PLC Port configuration

screen in the DTU3005 Editor Program. Whenever the

DTU Address (address which it resides at on the PPI

network) is set to 125, it will act as a single master.

Passthrough Port

For Siemens S7-200 PLCs, there is an additional

advantage to the “Passthrough” port of the DTU3005.

It allows a non-token passing master such as a per-

sonal computer running Micro/DOS to have access to

a multiple-master token passing network without the

requirement for an MPI card in the personal computer.

This feature can only be used when the DTU Address

is not set to 125 (see above).

A.12 Square D Model 100-700 PLCs

Registers Accessed

The DTU3005 will only access registers in the Data

Area of PLC memory (S10 to S9999). When entering

9999) should be entered. For example, to access regis-

ter number S10, the value 10 should be entered.

A.13 Square D TSX07 PLCs

Registers Accessed

The DTU3005 will only access registers in the Memory

Word Area of PLC memory (%MW0 to %MW999).

When entering register numbers, only the offset into

this area (0-999) should be entered. For example, to

access register number %MW0, the value 0 should be

entered. To access register number %MW999, the

value 999 should be entered.

A.14 TI505 Series PLCs

Registers Accessed

The DTU3005 will only access registers in the V Area

of PLC memory (V1 to V9999). When entering register

numbers, only the offset into this area (1-9999) should

be entered. For example, to access register number

V1, the value 1 should be entered. To access register

number V9999, the value 9999 should be entered.

Passthrough Port

When using TISOFT PLC programming software on

the passthrough port (Port 3) of the DTU3005, the soft-

ware must be invoked with the following parameters:

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 140 141

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