Ritron DATAFLOW RTU Series Guia do Utilizador descarregar pdf (Página 42)

DATAFLOW RTU

EXAMPLE 2

8.3 EXAMPLE 2 configures three DATAFLOW RTUs with one connected to two others. RTU

ID 1 has two digital inputs, two digital outputs and two analog outputs. RTU ID 2 and RTU

ID 3 each have one digital input, one digital output and one analog input. The inputs and

outputs are mapped to each other as shown in the following tables:

RTU ID 1 RF LINK 1 RTU ID 2

Input 1 connected to Digital Output 1

Input 2

Input 3

Input 4

Digital Output 1 connected to Input 1

Digital Output 2

Analog Output 1 connected to Input 2

Analog Output 2

RTU ID 1 RF LINK 2 RTU ID 3

Input 1

Input 2 connected to Digital Output 1

Input 3

Input 4

Digital Output 1

Digital Output 2 connected to Input 1

Analog Output 1

Analog Output 2 connected to Input 2

8.3.1 RTU ID 1 SETUP: Example 2 requires one DATAFLOW RTU to be wired and its hardware

configured according to Figure B4 - EXAMPLE 2 RTU ID 1 Wiring Diagram, shown on page

B-28. Load Software Programming configuration file EXP2ID1.USR into RTU ID 1.

8.3.2 RTU ID 2 SETUP: Example 2 requires one DATAFLOW RTU to be wired and its hardware

configured according to Figure B5 - EXAMPLE 2 RTU ID 2 Wiring Diagram, shown on page

B-29. Load Software Programming configuration file EXP2ID2.USR into RTU ID 2.

8.3.3 RTU ID 3 SETUP: Example 2 requires one DATAFLOW RTU to be wired and its hardware

configured according to Figure B6 - EXAMPLE 2 RTU ID 3 Wiring Diagram, shown on page

B-30. Load Software Programming configuration file EXP2ID3.USR into RTU ID 3.

8.3.4 EXPLANATION: Example 2 illustrates point-to-multipoint RTU operation. Examine the

configuration files of these three RTUs. Be certain to understand the following items before

advancing to Example 3:

· SEND LIST

· FAIL-SAFE STATE

· I/O CONFIG

The following text provides detailed descriptions of the above items.

8.3.4.1 SEND LIST is the list of IDs used by the RTU when transmitting messages. Each outgoing

message has to ID n attached to it. In Example 2, RTU ID 1 has to ID 2 and to ID 3 in

its SEND LIST. RTU ID 1 transmit messages first to RTU ID 2. When an acknowledge is

received from RTU ID 2 or when the maximum number of attempts is reached, the

message is then transmitted to RTU ID 3.

(Example 2 continued on next page)

( B-17 )

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