Ritron DATAFLOW RTU Series Guide de l'utilisateur télécharger pdf (Page 35)

Software/Programming

The SCADA controller is directly connected to RTU 1 by a serial link. The SCADA controller

polls RTU 1, RTU 2, RTU 3, and MODBUS Device 4. The EEPROM configuration for RTU 1

should be:

End

Repeaters RTU TO

1234 ID ID

EEPROM Point # 1 0000 2 2

EEPROM Point # 2 2000 3 3

EEPROM Point # 3 2000 3 4

EEPROM Point # 4 0000 0 0

In the previous example, there are no repeaters between RTU 1 and RTU 2. If the SCADA

controller polls RTU 2, the last RTU in the path is RTU 2. If the SCADA controller polls RTU

3, then RTU 2 acts as a repeater. The last RTU is RTU 3 Entry number 3 is the same as

entry number 2 except that the final address is MODBUS device 4. RTU 3 is the end RTU.

It transmits the message to the MODBUS device serially.

>>> RTU PROGRAMMER VERSION 3.03 HELP FILE <<<(continued)

3.1 EEPROM SCADA Points

Four SCADA points can be stored in EEPROM. If power to the RTU is temporarily lost

and then returns, the EEPROM points will not be lost. The repeater columns list, in order,

the repeaters between this RTU and the End RTU. The To ID is the RTU or other MODBUS

device which the SCADA program will request information from. If the To ID is an RTU, the

To ID and End RTU will be identical. If the To ID is another MODBUS device, the End RTU

must be directly connected to the MODBUS device by a serial link.

Example 4:

|--------------- | | . . . . . . .. .. .. .. ..| . . . . . . .. .. |

| SCADA | Serial | RF link 1-2 | RF link 2-3 | Serial |------------|

| Controller link |---------| |-------| |-------| link |Modbus|

| | | RTU | | RTU | | RTU | | Device |

|--------------| | 1 | | 2 | | 3 | | 4 |

| ||||| || | |

|--------------| |------------| |------------| |----------- | |------------ |

( B-10 )

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 62 63

Pas de commentaire

Ritron DATAFLOW RTU Series Guide de l'utilisateur Page 35